(a)
Interpretation:
The determination of complete rate law from the data is possible or not has to be examined.
Concept Introduction:
The relationship between rate and initial concentration of reactant is described by rate law. It is an experimentally determined equation and cannot be found out theoretically from the stoichiometry of the reactants and products.
Where,
(b)
Interpretation:
The rate law has to be determined by assuming that the rate does not depend on the concentration of hydroxide ion.
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
Rate constant has to be calculated by assuming that the rate does not depend on the concentration of hydroxide ion.
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
The initial
Concept Introduction:
Refer to part (a).
(e)
Interpretation:
The rate of the reaction has to be calculated when the concentration of
Concept Introduction:
Refer to part (a).
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Chapter 11 Solutions
Chemistry: The Molecular Science
- The following rate constants were obtained in an experiment in which the decomposition of gaseous N2O; was studied as a function of temperature. The products were NO, and NO,. Temperature (K) 3.5 x 10_i 298 2.2 x 10"4 308 6.8 X IO-4 318 3.1 x 10 1 328 Determine Etfor this reaction in kj/mol.arrow_forwardDefine stability from both a kinetic and thermodynamic perspective. Give examples to show the differences in these concepts.arrow_forwardWhen boron trifluoride reacts with ammonia, the following reaction occurs: BF3(g)+NH3(g)BF3NH3(g)The following data are obtained at a particular temperature: (a) What is the order of the reaction with respect to BF3, NH3, and overall? (b) Write the rate expression for the reaction. (c) Calculate k for the reaction. (d) When [ BF3 ]=0.533M and NH3=0.300M, what is the rate of the reaction at the temperature of the experiment?arrow_forward
- (a) Consider the following (overall) chemical reaction k A B The experimentally determined rate law expression reads: rate = k[A]. At 30 °C, the value of k is 3 x 10-4 s¹. Let the initial concentration of A be [A]0 = 0.75 mol L-¹. The reaction should proceed until only 2% of the initial amount of A is present in the reaction mixture. (i) How long will this take at 30°C? (ii) What value would the rate coefficient k have to be, in order for the concentration of A to reach the 2% level in 1 hour? (iii) At what temperature will k reach the value you calculated in (ii) assuming that the activation energy is 40 kJ mol¹?arrow_forwardConsider the following reaction: 2 NO(g) + 2 H2(g) N2(g) + 2 H2O(g) (a) The rate law for this reaction is second order in NO(g) and first-order in H2(g). What is the rate law for this reaction? (b) If the rate constant for this reaction at a certain temperature is 9.70e+04, what is the reaction rate when [NO(g)] = 0.0560 M and [H2(g)] = 0.119 M?Rate = M/s.(c) What is the reaction rate when the concentration of NO(g) is doubled, to 0.112 M while the concentration of H2(g) is 0.119 M?Rate = M/sarrow_forwardThe following data was obtained from the reaction: (a) Determine the rate law. (b) Calculate the rate constant. (c) Calculate the initial rate, if [NO2~] = 0.1 M and [NH4+] = 0.1 Marrow_forward
- The radioactive isotope 28Mg has a half-life of 20.9 hours. (a) What is the rate constant for this first-order reaction? (b) What fraction of the isotope remains after 24 hours? Assume 3 significant figures in your calculations.arrow_forward(iv) The activation energy, Ea, and pre-exponential factor, A, for the decomposition of N2O5: N2O5→ 2 NO2 + ½ O2 are: E = 102.2 kJ mol-1 and A = 2.81 x 1013 s-1. (a) Using these data calculate the rate constant of the reaction at 300 K. (b) Assuming the reaction is first order calculate the rate of the reaction, at 300 K, when the concentration of N2O5 is 0.015 mol L-1.arrow_forwardThe following kinetic data are collected for the initial rates of a reaction 2 X + Z→ products: Experiment [X ]o(M) [Z]o(M) Rate (M/s) 0.25 0.25 4.0 x 10! 0.50 0.50 3.2 x 102 0.50 0.75 7.2 x 102 (a) What is the rate law for this reaction? (b) What is the value of the rate constant with proper units? (c) What is the reaction rate when the initial concentration of X is 0.75 M and that of Z is 1.25 M? 2. 3.arrow_forward
- The enzyme urease catalyzes the reaction of urea, 1NH2CONH22, with water to produce carbon dioxide and ammonia. In water, without the enzyme, the reaction proceeds with a first-order rate constant of 4.15 * 10-5 s-1 at 100 °C. In the presence of the enzyme in water, the reaction proceeds with a rate constant of 3.4 * 104 s-1 at 21 °C. (a) Write out the balanced equation for the reaction catalyzed by urease.arrow_forwardConsider the following reaction: 1. 2 N,O5 (g) → 4 NO, (g) + O, (g) The initial concentration of N2O5 was 0.48 mol/L, and 25 minutes after initiating the reaction, all of the N,Os has been consumed. (a) Calculate the average rate of the reaction over this 25-minute time interval. (b) Is it correct to assume that the rate law is Rate = k[N,O5]² based on the balanced chemical equation? Briefly explain your answer.arrow_forward6. The rate constant for the reaction, 2 N₂O5 (g) → 4 NO2 (g) + O2 (g), doubles when the temperature is raised from 295.65 K to 300.62 K. (a) Determine the activation energy (in kJ/mol) for the reaction, assuming that the pre- exponential factor, A, in the Arrhenius equation is independent of temperature. (b) At what temperature would you predict this rate constant to increase by another factor of 10 relative to its value at 300.62 K?arrow_forward
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