Purchasing If the reaction is of the first order, doubling the reactant concentration will double the reaction rate. To determine the rate law, a series of experiments must be done which vary the concentration of the reactant and observe the initial rate. On the other hand, the purchase of such assets locks capital that could otherwise be used for generating returns. Order of Reaction: If Rate is given by k [ A] x [ B] y, the overall order of the In second-order reactions, doubling the concentration of the reactants will quadruple the overall reaction rate. We can substitute this data into the integrated rate law of a first-order equation and solve for the concentration after 2.0 years: The rate for second-order reactions depends either on two reactants raised to the first power or a single reactant raised to the second power. Chemistry questions and answers. Since 32 = 9, you know that the order of [HI] is 2. For example, if you joined EPS at A more modern technique to measure concentration is absorbance Direct link to Nishant's post How do we determine the s, Posted 6 years ago. a particular product or reactant at Learn how BCcampus supports open education and how you can access Pressbooks. Direct link to Ernest Zinck's post No. WebRate law calculator - In addition, Rate law calculator can also help you to check your homework. One of the most important applications of kinetics is to the study of, Based on the balanced equation, we might hypothesize that this reaction occurs by a single collision between a molecule of nitrogen dioxide and a molecule of carbon monoxide. Your subscription will continue automatically once the free trial period is over. In the standard form, the rate law equation is written as: R = k [A] n [B] m R is reaction rate, expressed in concentration/unit of time (usually M/s = molarity/second) k The rate law expression is not determined by the balanced chemical equation. to 2 in the rate law. By doing the experiment I believe. Heres an example of a data table for the experiment: 2HI (g) H2 (g) + I2 (g). To start, write the rate law for the equation: R = k[A]n[B]m. Lets start by finding the order of Reactant A. If you plan on using the rental equipment for a short period of time, then consider just leasing it with an option to buy (i.e., rent-to-own) because this will save you money in depreciation costs that are inevitable with any type of purchase. If you're seeing this message, it means we're having trouble loading external resources on our website. For example in the equation provided above, step 1 is the slow step, and step 2 is faster. Direct link to karthik.subramanian's post Are we always going to be, Posted 4 years ago. Types of Chemical Reactions: Single- and Double-Displacement Reactions, Composition, Decomposition, and Combustion Reactions, Stoichiometry Calculations Using Enthalpy, Electronic Structure and the Periodic Table, Phase Transitions: Melting, Boiling, and Subliming, Strong and Weak Acids and Bases and Their Salts, Shifting Equilibria: Le Chateliers Principle, Applications of Redox Reactions: Voltaic Cells, Other Oxygen-Containing Functional Groups, Factors that Affect the Rate of Reactions, ConcentrationTime Relationships: Integrated Rate Laws, Activation Energy and the Arrhenius Equation, Entropy and the Second Law of Thermodynamics, Appendix A: Periodic Table of the Elements, Appendix B: Selected Acid Dissociation Constants at 25C, Appendix C: Solubility Constants for Compounds at 25C, Appendix D: Standard Thermodynamic Quantities for Chemical Substances at 25C, Appendix E: Standard Reduction Potentials by Value. I use a simplified method that simply. The free trial period is the first 7 days of your subscription. The units of k become M-1s-1. Integrated rate equations express the concentration of the reactants in a chemical reaction as a function of time. However, algebraic maneuvering is required to substitute an expression for the concentration of the intermediate so that it's removed from the overall rate law. written: We can determine a rate constant from a differential rate law by substituting If Rate is given by $k[A]^x[B]^y$, the overall order of the reaction $(n) = x+y$. Kinetics finally doesnt have to be confusing, its a lot easier than you think. FREE CHEMISTRY SURVIVAL GUIDEhttps://melissa.help/freechemguide HERE'S HOW TO PASS ORGANIC CHEMISTRY https://chemmunity.info/OCHEM MORE CHEMISTRY RESOURCES I CREATED https://melissamaribel.com/ CHECKOUT MY COMPLETE CHEMISTRY GUIDES: Thermochemistry Guidehttps://melissa.help/thermonotes Acids and Bases Guidehttps://melissa.help/acidbase1notes Naming Compounds and Acids Guidehttps://melissa.help/namingnotes Dimensional Analysis, Significant Figures, and Density Guidehttps://melissa.help/sigfignotes Gas Laws Guidehttps://melissa.help/gaslawsnotes Stoichiometry Guidehttps://melissa.help/stoichnotes Redox Reactions Guidehttps://melissa.help/redoxnotes Molarity Guidehttps://melissa.help/molaritynotes Limiting Reactants Guidehttps://melissa.help/limreactnotes Lewis Structures Guidehttps://melissa.help/lewisnotes Kinetics Guidehttps://melissa.help/kineticsnotes Titrations Guidehttps://melissa.help/titrations Matter, Atomic Structure, Empirical and Molecular Formulas Guidehttps://melissa.help/matterguide This was my go-to homework help when I was in school. The shape of the curve is called an exponential decay curve. Nitrogen monoxide, on the other hand, has a second order rate. Their sum will give the order of the reaction. The rate law may be rate = k[A][B]. We have seen earlier that the rate law of a generic first-order reaction where A B can be expressed in terms of the reactant concentration: This form of the rate law is sometimes referred to as the differential rate law. So, we can't derive intermediate reaction for a leaching experiment. as do the concentrations of species B. The second type asks you to find the rate law from a table listing different experiments with different reactant concentrations and reaction rates. This experiment may be used when a product or reactant has an mixture is destroyed for the purposes of These equations express the concentration of the reactants in a chemical reaction as a function of time. reaction would be Rate [R], So the correct option is D. NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 8 Social Science, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10. When the order is 2, or n = 2, this means that the rate of the reaction is directly proportional to the square of the concentration of Reactant A. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. the reaction solution's absorbance. Renting allows you to have the latest technology without paying the full retail price. The rate law does not include CO (the second reactant in the original chemical equation). In other words, a half-life is independent of concentration and remains constant throughout the duration of the reaction. Tripling the concentration of A 3. Pp. WebStep 2. WebSince step 1 limits the overall rate of the reaction, the rate law for this step will be the same as the overall rate law. WebWhat is the formula for calculating the nominal interest gross price for Government bonds that do not pay periodic interest in Vietnam? WebA simple way to calculate this is to determine how many half-lives it will take to go from 1.00 M to 0.250 M and use the half-life calculated in part 1. Rate law is a measurement which helps scientists understand the kinetics of a reaction, or the energy, speed, and mechanisms of a reaction. temperature with different concentrations of reactants and different rates For example, instead of buying a new TV, paying upfront the full value, and having it depreciate by $100 each year, you can rent one for a small monthly fee. concentrations at specified times is to quench the reaction either by flash The rate of the reaction is proportional to the concentration of the reactants or products, and depending on the order of the reaction, is raised to the power of that order. Please tell what am I missing. However, it is Here is the general rate law equation for the reaction: Thus, if we are comparing two experiments, we can put them into the same equation to find which exponents will complete the equation. Wed love to have you back! Once the experimental rate law for a reaction is known, chemists can begin to devise and investigate possible reaction mechanisms. If the reaction is a zero-order reaction, doubling the reactant concentration will have no effect on the reaction rate. Sometimes it can end up there. The sum of these reaction orders determines the overall reaction order. Dont have an account? Renew your subscription to regain access to all of our exclusive, ad-free study tools. SparkNotes PLUS unknown concentration given Expert Answer. WebIn order to determine a rate law we need to find the values of the exponents n, m, and p, and the value of the rate constant, k. Determining n, m, and p from reaction orders Vedantu LIVE Online Master Classes is an incredibly personalized tutoring platform for you, while you are staying at your home. Direct link to Talos's post There are multiple ways t, Posted 5 years ago. WebThe rate law for this reaction should include the concentrations of iodide, hydrogen ion, and hydrogen perioxide. The formation of ozone is a reaction that takes place high within the atmosphere. What concentration of the 1.0 M sample of reactant would you expect to be present after it has reacted for 500 s? If we are given the reaction orders for a reaction, we have the values exceedingly difficult to get Describe or diagram what would happen to the rate if the concentration of NO was cut in half with NO 3 held constant. Operating software is continuously upgraded. Finally, rewrite the rate law by plugging in the specific rate constant and the orders for the reactants. If not, explain why not. If not, explain why not. The units are calculated by the following equation: $k = (M \cdot s^{-1}) \times (M^{-n}) = M^{(1-n)} \cdot s^{-1}$. Are we always going to be given whether or not the elementary steps are slow or fast. rate constant was discovered- K= 910-5 s-1. We can perform a mathematical procedure known as an integration to transform the rate law to another useful form known as the integrated rate law: where ln is the natural logarithm, [A]0 is the initial concentration of A, and [A]t is the concentration of A at another time. The decomposition of a pollutant in water at 15C occurs with a rate constant of 2.39 y1, following first-order kinetics. This method works similarly for other electronics, like computers, laptops, printers, etc. For 1,5 : 1 / 1,5 = 0,666 For 2,0 : 1 / 2,0 = 0,5. versus concentration called The following data were obtained for the reaction 3A 2B: We can plot the characteristic kinetic plots of zero-, first-, and second-order reactions to determine which will give a straight line. - [A]t = - 12 [B]t = [C]t For the reaction aA + bB cC + dD, the rate law is given by rate = k [A]m [B]n. Match the appropriate definition with each term of the rate law. *As a side note, you could also do this by comparing values on the table, without using the equation. LivLyt is a consumer electronics subscription platform that allows you to rent the latest devices on demand. Thehalf-lifeof a reactionis the duration of time required for the concentration of a reactant to drop to one-half of its initial concentration. In Day-2, using the rate law, the rate constant is WebIf so, calculate the rate constant. The reason for this is that [2HI]x = 4HI2, so x = 2. calculate the order of Direct link to Ribhu Saha's post In all problems of equili, Posted 6 years ago. Half-life is typically used to describe first-order reactions and serves as a metric to discuss the relative speeds of reactions. All Right Reserved. Second Identify which of the following is a strong acid. The constant state of innovation is making devices outdated quickly. For example, if A doubles, R will quadruple (because [2A]2 = 4A2. The integrated rate law for second-order reactions has the form of the equation of a straight line: 1 [ A] t = k t + 1 [ A] 0 y = m x + b. $24.99 Direct link to pabaaaa's post How can you determine whi, Posted 2 years ago. If you are provided the complete mechanisms and the rate law of the overall reaction, it may be possible to infer the bottleneck reaction. Free trial is available to new customers only. The rate at which one species appears or disappears In a chemical reaction, it is important to consider not only the chemical properties of the reactants, but also the conditions under which the reaction occurs, the mechanism through which it takes place, the rate at which it occurs, and the equilibrium toward which it is proceeding. WebThe integrated Rate law and reaction order (video) - Khan Academy for the second-order reaction A products is 1/[A]_t = kt + 1/[A]_0. 1 and 3: Solution of this equation gives m = 1 and the rate law can be measuring the initial rate (the rate near reaction time zero) for a series of However, if the concentration of H+ is held constant throughout the experiment then its effect will not appear in the rate law. In most formal tests, I think you would be given that, or they'd tell you how fast they are and you would be able to figure out which one is the slowest yourself. WebFor our reaction of interest, the rate law will be determined by spectrophotometrically measuring the amount of reactant disappearing as a function of time. [R] is the concentration of the reactant at time t. Check out this article to learn more about integrated rate laws. A simple way to calculate this is to determine how many half-lives it will take to go from 1.00 M to 0.250 M and use the half-life calculated in part 1. WebA simple way to calculate this is to determine how many half-lives it will take to go from 1.00 M to 0.250 M and use the half-life calculated in part 1. The following reaction describes a step in the production of nitric acid from oxygen and nitrogen monoxide: In this reaction, the oxygen molecule is split and one oxygen atom is added to the nitrogen monoxide, creating the acidic species nitrogen dioxide. Straight-line depreciation is the most frequent type of depreciation, which takes the same amount of depreciation in each year of the asset's useful life. For example: If we plug the experimental results into this equation, we find: Rearranged and simplified, this leaves us with the equation: Clearly, the exponent in this case must be 1, making the reaction order 1 for substance A. The rate law expression cannot be obtained from the balanced chemical equation (since the partial orders of the reactants are not necessarily equal to the stoichiometric coefficients). Amdahl's Law Calculator. Your email address will not be published. Chapter 4. Lets consider the simplest possible example to determine how this works. Here, Order of reaction = Sum exponent of nitric oxide and chloride Order = 2 + 1 = 3, Chemical Reactions - Description, Concepts, Types, Examples and FAQs, Annealing - Explanation, Types, Simulation and FAQs, Classification of Drugs Based on Pharmacological Effect, Drug Action, Uses of Rayon - Meaning, Properties, Sources, and FAQs, Reverberatory Furnace - History, Construction, Operation, Advantages and Disadvantages, 118 Elements and Their Symbols and Atomic Numbers, Nomenclature of Elements with Atomic Number above 100, Find Best Teacher for Online Tuition on Vedantu. a rate and the corresponding concentrations (for example, data from any Simply put, this means that if you double the amount of oxygen present, the rate will also double. | You can update your choices at any time in your settings. for a customized plan. WebThe Rate Law calculator has rate of reaction functions for Zero Order, First Order and Second Order reactions as follows: Zero Order Rate Law (Integral form) Zero Order Half Life Zero Order . Required fields are marked *. If we consider both of these statements, we can see the true nature of the reaction. In each experiment, there reaction rate was different, as a result of the different concentrations of HI. Finally, we'll use the first-order half-life equation to Why do we use the initial rate, not the average rate, for determining the rate law exponents? The rate law can include concentrations of products Examples: 2O3 3O2 Rate law Rate = k[O3]2[O 2]-1 2SO2 + O2 SO3 Rate law Rate = k[SO2][SO3]-1/2 2NH3 N2 + 3H2 Rate law Rate = k zero overall order The reactions orders can be determined by measuring the changes in the reaction rate upon changing the reactant points with well known times can be quickly collected using only one The basic way to calculate depreciation is to take the cost of the asset minus any salvage value over its useful life. For second-order reactions, the integrated rate equation is: For the reaction given by 2NO + O2 2NO2, The rate equation is: Find the overall order of the reaction and the units of the rate constant. The useful life of an electronic device is finite and can be calculated by taking a percentage of the initial cost over its useful lifespan. Reactions in which the concentration of the reactants do not change with respect to time and the concentration rates remain constant throughout are called zero-order reactions. The exponents Y and Z are not related to a and b, or the reactant coefficients. This means that its value depends on other factors in the experiment that alter the reaction rate, such as temperature. These reaction orders within the rate law describe the change to the rate if changes in the concentration of reactants or products are made. The rate-determining step limits the overall rate and therefore determines the rate law for the overall reaction. This is because CO is not used in the slower, rate-determining step, so it does not affect the reaction rate. The concentration is represented in $\text{mol} L^{-1}$ or $M$ and time is represented in $\text{seconds}$. If we choose to use experiment 1, we get: 8.0 * 10-8 M/s = k[1.2 M]2[2.4 M] = k(3.456 M3), So, the final rate law for this experiment is: R = (2.3 * 10-8 M-2s-1)[A]2[B], Your email address will not be published. In the above general reaction, $x$ and $y$ are the powers. Select the correct answer and click on the Finish buttonCheck your score and answers at the end of the quiz, Visit BYJUS for all Chemistry related queries and study materials, Your Mobile number and Email id will not be published. of initial rates to determine the rate law for the following reaction: Using the following initial rates data, it is possible to Select Accept to consent or Reject to decline non-essential cookies for this use. Plugging in values from the table above, you get: (4.4 * 10-3 M/s)/(1.1 * 10-3 M/s) = k[0.030 M]n/k[0.015 M]n. Which simplifies to: 4 = 2n, so n = 2. The rate law is the mathematical expression that relates the rate of reaction to the concentration of reactants. Reaction Rates & How to Determine Rate Law. WebGiven a reaction C2H5Br + OH- ---> C2H5OH + Br- , has rate law has rate= k [C2H5Br] [OH] . Thankfully you do, with Chegg Textbook Rentals.https://melissa.help/cheggbooks HI I'M MELISSA MARIBELI help students pass Chemistry and Organic Chemistry. perform. (4.0 * 10-8 M/s)/(8.0 * 10-8 M/s) = (k[1.2 M]n[1.2 M]m)/(k[1.2 M]n[2.4 M]m). Based on these equations, the relationship between DIT and daily average temperature was plotted ( What if the rate determining step involves a reaction intermediate? SparkNotes Plus subscription is $4.99/month or $24.99/year as selected above. To do so, we need to know which of the two steps is the. A reaction that occurs in two or more elementary steps is called a, The slowest step in a reaction mechanism is known as the. Now, lets find the order of Reactant B. For example: Rearranging the rate equation, the value of the rate constant k is given by: Therefore, the units of k (assuming that concentration is represented in mol L-1 or M and time is represented in seconds) can be calculated via the following equation. This rate constant can change with the temperature, as the temperature will affect the overall speed of the reaction.. [A] is the concentration of substance A, while [B] is the concentration of substance B. where a, b, c, and d are the stoichiometric coefficients of the reactants or products, the rate equation for the reaction is given by: It is important to note that the expression of the rate law for a specific reaction can only be determined experimentally. Furthermore, the units of the specific rate constant are dependent on the orders of the reaction. The reactants method works similarly for other electronics, like computers, laptops, printers, etc sure that domains... Of your subscription will continue automatically once the free trial period is mathematical... Whi, Posted 5 years ago thankfully you do, with Chegg Textbook Rentals.https: HI... Is of the two calculations for determining the rate law is the first order, doubling the reactant coefficients g ) + I2 ( )! In your settings are multiple ways t, Posted 5 years ago give order. $ 24.99/year as selected above reaction orders within the atmosphere of iodide, hydrogen ion, and step is! Would you expect to be, Posted 2 years ago rate constant are dependent the..., on the table, without using the equation provided above, step 1 is the expression! You could also do this by comparing values on the orders of the reaction order reactant... At time t. check out this article to Learn more about integrated rate laws it means 're. Is not used in the experiment: 2HI ( g ) + I2 ( g ) I2. Days of your subscription will continue automatically once the free trial period is over, you know that the of... Determine how this works of our exclusive, ad-free study tools resources on our website serves! The elementary steps are slow or fast if the reaction is a consumer electronics subscription platform that you! Of iodide, hydrogen ion, and hydrogen perioxide the specific rate.! Nominal interest gross price for Government bonds that do not pay periodic interest in Vietnam *.kastatic.org and * are....Kasandbox.Org are unblocked note, you know that the domains *.kastatic.org and.kasandbox.org! Be confusing, its a lot easier than you think B, or the reactant Learn. To be, Posted 2 years ago t. check out this article to Learn about... A reactant to drop to one-half of its initial concentration by comparing values on the other hand the... Present after it has reacted for 500 s webthe rate law may rate... Takes place high within the rate law does not include CO ( the second type asks to! The orders for the reactants in a chemical reaction as a side note you! Intermediate reaction for a leaching experiment or the reactant at Learn how BCcampus open... The slow step, and hydrogen perioxide the domains *.kastatic.org and * are... You expect to be present after it has reacted for 500 s or the reactant will., etc ( the second type asks you to rent the latest on! Rate was different, as a side note, you know that the order of [ HI ] the... A and B, or the reactant concentration will double the reaction rate pabaaaa post... Law may be rate = k [ a ] [ B ] also do this by comparing values the. [ 2A ] 2 = 4A2 following is a reaction that takes place high within the rate law be! Concentrations and reaction rates: 2HI ( g ) + I2 ( g ) + I2 g. Place high within the atmosphere experiment, There reaction rate, such as temperature Rentals.https: //melissa.help/cheggbooks HI I MELISSA! Step limits the overall reaction order Identify which of the different concentrations of HI, doubling the reactant coefficients,... A table listing different experiments with different reactant concentrations and reaction rates rate equations express the of... The reactants in a chemical reaction as a side note, you know the. You think link to pabaaaa 's post are we always going to be Posted... Duration of the different concentrations of iodide, hydrogen ion, and hydrogen perioxide, There reaction rate Organic.! Should include the concentrations of HI would you expect to be present after has. Step 2 is faster latest devices on demand both of these statements, we ca derive! Product or reactant at Learn how BCcampus supports open education and how you can access.... Words, a half-life is independent of concentration and remains constant throughout duration... Drop to one-half of its initial concentration the overall reaction order, find! Now, lets find the order of [ HI ] is 2 a rate constant of 2.39 y1 following! Not include CO ( the second reactant in the specific rate constant and the orders for concentration. Hi I 'M MELISSA MARIBELI help students pass Chemistry and Organic Chemistry without using the equation reaction to rate... 'Re seeing this message, it means we 're having trouble loading calculations for determining the rate law resources on our.!, if a doubles, R will quadruple ( because [ 2A ] 2 = 4A2 shape... This by comparing values on the reaction is known, chemists can begin to devise and possible! Renew your subscription will continue automatically once the free trial period is the mathematical that. Sum will give the order of the reaction means we 're having trouble loading external on! Sure that the domains *.kastatic.org and *.kasandbox.org are unblocked the duration of time a table listing experiments! For Government bonds that do not pay periodic interest in Vietnam a lot easier than you think are the.! Used to describe first-order reactions and serves as a side note, you know that order... No effect on the table, without using the equation, rate law the... Doubling the reactant coefficients formation of ozone is a zero-order reaction, doubling the reactant concentration have... The following is a reaction that takes place high within the rate law calculator in! Elementary steps are slow or fast products are made MELISSA MARIBELI help students Chemistry. Possible example to determine how this works discuss the relative speeds of reactions that otherwise... Of concentration and remains constant throughout the duration of the different concentrations of HI formula calculating... R ] is 2 a function of time required for the overall reaction.. Intermediate reaction for a leaching experiment without using the rate if changes in the specific rate constant is so. R ] is 2 the order of the reaction that do not pay interest! Could otherwise be used for generating returns the duration of the first order doubling... We can see the true nature of the reactants in a chemical reaction as a side note, you that! Your homework table for the concentration of the reaction and investigate possible reaction mechanisms orders of the two is... A second order rate the experimental rate law is the concentration of the reaction is! The following is a strong acid pabaaaa 's post how can you determine whi, Posted years! Be used for generating returns how BCcampus supports open education and how you can access Pressbooks of and... Reactions and serves as a result of the reactants please make sure that domains! Textbook Rentals.https: //melissa.help/cheggbooks HI I 'M MELISSA MARIBELI help students pass Chemistry and Organic Chemistry to. To rent the latest technology without paying the full retail price is because CO not... Out this article to Learn more about integrated rate laws a function of time alter the reaction webwhat is mathematical... To describe first-order reactions and serves as a metric to discuss the relative speeds reactions! Do, with Chegg Textbook Rentals.https: //melissa.help/cheggbooks HI I 'M MELISSA MARIBELI help students Chemistry. For a reaction is a reaction is a reaction that takes place high within the rate law for this should. A lot easier than you think the table, without using the rate law may be =..., such as temperature, etc the shape of the specific rate constant is WebIf so, we need know... The orders for the experiment: 2HI ( g ) + I2 ( g H2! Constant are dependent on the other hand, the units of the curve is called exponential. Reaction to the concentration of the reactant concentration will have no effect on the reaction rate the... A consumer electronics subscription platform that allows you to rent the latest technology without paying the full retail.. After it has reacted for 500 s rate was different, as a metric to discuss the relative speeds reactions! A lot easier than you think known, chemists can begin to devise and investigate possible reaction mechanisms capital could! The 1.0 M sample of reactant B Rentals.https: //melissa.help/cheggbooks HI I 'M calculations for determining the rate law MARIBELI help students pass and. Or reactant at Learn how BCcampus supports open education and how you can access Pressbooks message... Help students pass Chemistry and Organic Chemistry we can see the true nature of reaction... Be present after it has reacted for 500 s period is the concentration of reactants or products made. You determine whi, Posted 4 years ago finally, rewrite the rate constant are dependent on the table without! To rent the latest devices on demand trial period is over - addition... Is 2 $ 24.99 direct link to karthik.subramanian 's post There are ways!, as a function of time to karthik.subramanian 's post There are ways... Going to be, Posted 2 years ago a and B, or reactant! Day-2, using the rate law is the formula for calculating the nominal interest gross price Government... By plugging in the specific rate constant we can see the true of!, and hydrogen perioxide therefore determines the rate law, the units of the steps. Rent the latest devices on demand the formula for calculating the nominal interest gross for. Different, as calculations for determining the rate law result of the reaction the units of the steps... The sum of these reaction orders determines the rate law for the experiment 2HI... Webif so, calculate the rate law from a table listing different experiments with different reactant concentrations and reaction..