Question 1

For the reaction shown below,what is the order of reaction with respect to Br^? ClO₂^-(aq)+ 4 Br^-(aq)+ 4 H⁺(aq)→ Cl^-(aq)+ 2 Br₂(aq)+2 H₂O(l)

Accepted Answer

The order of a reaction with respect to a specific reactant cannot be determined solely from the stoichiometric coefficients in the balanced chemical equation. It requires experimental data to establish how the rate of reaction depends on the concentration of that reactant.

Question 2

Cerium(IV)ion reacts with thallium(I)ion in a one-step reaction shown below. 2 Ce⁴⁺(aq)+ Tl⁺(aq)→ 2 Ce³⁺(aq)+ Tl³⁺(aq) If the rate law is: Rate = k[Ce⁴⁺]⁴[Tl⁺]²,what is the overall order of the reaction?

Accepted Answer

The overall order of the reaction is the sum of the exponents of the concentrations of the reactants in the rate law. In this case, the rate law is Rate = k[Ce⁴⁺]⁴[Tl⁺]², so the overall order of the reaction is 4 + 2 = 6.

Question 3

Hydroquinone,HOC₆H₆OH,can be formed by the reaction with acetylene below: 2 HCCH + 3 CO + H₂O → HOC₆H₄OH + CO₂ How is the rate of disappearance of acetylene,HCCH,related to the appearance of hydroquinone? - = ?

Accepted Answer

The answer of Hydroquinone,HOC₆H₆OH,can be formed by the reaction with...

Question 4

The reaction shown below has the rate law: Rate = k[BrO₃^-][Br^-][H⁺]². BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l) What is the order of reaction with respect to Br^-?

Accepted Answer

The rate law includes the term [Br^-] to the power of 5, indicating that the reaction is fifth order with respect to Br^-. However, there is no direct dependence on Br₃^- in the rate law, so it must be a first order reaction with respect to this species.

Question 5

If the units for rate are M s^-1,what are the units for the rate constant,k,for a zeroth-order reaction?

Accepted Answer

The units of the rate constant for a zeroth-order reaction must be the same as the units for the rate, which are given as M s^-1. Therefore, the units for the rate constant must cancel out the units for time in the rate expression, leaving just concentration units. Therefore, the correct units for the rate constant are M s^-1/ M = s^-1, which is equivalent to M s^-1S0U0P0. Among the answer choices, only option C matches this unit expression after canceling out the units for time.

Question 6

For a particular first-order reaction,it takes 48 minutes for the concentration of the reactant to decrease to 25% of its initial value.What is the value for rate constant (in s^-1)for the reaction?

Accepted Answer

The answer of For a particular first-order reaction,it takes 48...

Question 7

What is the overall reaction order for the reaction that has the rate law: Rate = k[Cl]²[N₂]^?

Accepted Answer

The overall reaction order is determined by adding the exponents in the rate law. In this case, the exponents are 2 for Cl and 1 for N, giving a total of 3, which means the reaction is third order.

Question 8

For a reaction that follows the general rate law,Rate = k[A][B]²,what will happen to the rate of reaction if the concentration of B is increased by a factor of 1.50? The rate will

Accepted Answer

Since the rate law is directly proportional to the concentration of B ([B]), increasing [B] by a factor of 1.50 will increase the rate by the square of this factor (1.50^2 = 2.25) because the reaction order with respect to B appears to be 1 (given the notation [B]^1 implicitly).

Question 9

For a reaction that follows the general rate law,Rate = k[A][B]²,what will happen to the rate of reaction if the concentration of A is increased by a factor of 1.50? The rate will

Accepted Answer

According to the rate law, the rate of the reaction is directly proportional to the concentration of A raised to the power of 1. Therefore, if the concentration of A is increased by a factor of 1.50, the rate of the reaction will also increase by the same factor (1.50).

Question 10

For the reaction shown below,what is the relationship between the rate of formation of Br₂ and the rate of reaction of ClO₂^-over the same time period? ClO₂^-(aq)+ 4 Br^-(aq)+ 4 H⁺(aq)→ Cl^-(aq)+ 2 Br₂(aq)+2 H₂O(l)

Accepted Answer

According to the balanced chemical equation, the stoichiometric ratio between ClO₂^- and Br₂ is 1:2. This means that for every 1 mole of ClO₂^- consumed, 2 moles of Br₂ are formed. Therefore, the rate of formation of Br₂ is two times the rate of reaction of ClO₂^-. Hence, choice A is the correct answer.

Question 11

The reaction between chlorine and nitric oxide to form nitrosyl chloride is shown below.If the reaction rate doubles when the concentration of Cl₂ is doubled and the rate quadruples when the concentration of NO is doubled,by what factor will the rate increase if both concentrations,NO and Cl₂,are doubled? Cl₂(g)+ 2 NO(g)→ 2 NOCl(g)

Accepted Answer

Since the rate doubles when [Cl2] doubles, we can conclude that the reaction is first order with respect to Cl2. Similarly, since the rate quadruples when [NO] doubles, we can conclude that the reaction is second order with respect to NO. Therefore, the overall rate equation is Rate = k[Cl2][NO]^2.

If both [Cl2] and [NO] are doubled, the new rate would be: 
New Rate = k(2[Cl2])(2[NO])^2 = 8k[Cl2][NO]^2

Therefore, the rate would increase by a factor of 8. Therefore, the correct answer is C.

Question 12

If the units for rate are M s^-1,what are the units for the rate constant,k,if the overall order of the reaction is five?

Accepted Answer

The units of the rate constant, k, depend on the overall order of the reaction. For a reaction of overall order 5, the units of k can be derived from the rate equation, rate = k[A]^m[B]^n..., where m+n+...=5. Given the units of rate (M s^-1), and knowing the reaction order is 5, the units for k must offset the concentration units raised to the power of 4 (since one concentration term is already present in the rate's units), resulting in M^-4 s^-1 for k's units.

Question 13

For the zeroth-order reaction: A → products,what will happen to the rate of reaction if the concentration of A is tripled?

Accepted Answer

For a zeroth-order reaction, the rate is independent of the concentration of the reactant A. Therefore, tripling the concentration of A will not affect the rate of the reaction.

Question 14

Which term describes the measure of the decrease in the concentration of a product per unit time?

Accepted Answer

Reaction rate is defined as the measure of the decrease in the concentration of a product per unit time. Option A (reactant energy) refers to the activation energy required for a reaction to occur. Option B (kinetics) is the study of reaction rates and mechanisms. Option D (reaction time) refers to the duration required for a reaction to occur.

Question 15

For the zeroth-order reaction: C → products,-Δ[C]/Δt = k,which of the following graphs would be expected to give a straight line?

Accepted Answer

For a zeroth-order reaction, the rate of reaction is constant and does not depend on the concentration of the reactants. Therefore, plotting concentration [C] versus time t gives a straight line, indicating a constant rate of decrease in concentration over time.

Question 16

Given the following hypothetical reaction: 2 E(g)+ F(g)+ G(g)→ products.If the rate law is: Rate = k[E]²[F]^-1,what is the overall order of reaction?

Accepted Answer

The answer of Given the following hypothetical reaction: 2 E(g)+...

Question 17

The reaction below is first order in H₂ and second order in NO.What is the rate law for this reaction? 2 H₂(g)+ 2 NO(g)→ N₂(g)+ 2 H₂O(g)

Accepted Answer

The rate law for a reaction is determined by the reaction's order with respect to each reactant. Given that the reaction is first order in HS (implied by "H₂") and second order in NO, the rate law is Rate = k[HS][NO]^2, which matches choice B when the formatting for superscripts is properly interpreted.

Question 18

Which statement is true for the general rate law: Rate = k[A]^m[B]ⁿ?

Accepted Answer

The statement "The values for the exponents must be determined by experiment" is true for the general rate law because the exponents (S1, U1, P1, and P0) cannot be predicted from the stoichiometry of the reaction and must be determined experimentally. Therefore, options A and D are incorrect. Option B is also incorrect because the overall order of the reaction can be any positive number, not just m times n.

Question 19

Given the following hypothetical reaction: 2 E(g)+ F(g)+ G(g)→ products.If the rate law is: Rate = k[E][F]^-1,what is the order of reaction with respect to E?

Accepted Answer

The order of reaction with respect to E is given by the exponent of [E] in the rate law. In this case, the exponent of [E] is 1, which means the reaction is first-order with respect to E.

Question 20

"Instantaneous rate" is defined as the

Accepted Answer

Instantaneous rate refers to the rate of reaction at a particular moment in time, usually measured as the change in concentration with respect to time at that moment. It is not the change in concentration per gram (A), an equation showing how the rate depends on the concentration of each product (B), or the rate of reaction at time zero (D).

Quiz 13: Chemical Kinetics

For the reaction shown below,what is the order of reaction with respect to Br^? ClO₂^-(aq) + 4 Br^-(aq) + 4 H⁺(aq) → Cl^-(aq) + 2 Br₂(aq) +2 H₂O(l)

Cerium(IV) ion reacts with thallium(I) ion in a one-step reaction shown below. 2 Ce⁴⁺(aq) + Tl⁺(aq) → 2 Ce³⁺(aq) + Tl³⁺(aq) If the rate law is: Rate = k[Ce⁴⁺]⁴[Tl⁺]²,what is the overall order of the reaction?

Hydroquinone,HOC₆H₆OH,can be formed by the reaction with acetylene below: 2 HCCH + 3 CO + H₂O → HOC₆H₄OH + CO₂ How is the rate of disappearance of acetylene,HCCH,related to the appearance of hydroquinone? - = ?

The reaction shown below has the rate law: Rate = k[BrO₃^-][Br^-][H⁺]². BrO₃^-(aq) + 5 Br^-(aq) + 6 H⁺(aq) → 3 Br₂(aq) + 3 H₂O(l) What is the order of reaction with respect to Br^-?

If the units for rate are M s^-1,what are the units for the rate constant,k,for a zeroth-order reaction?

For a particular first-order reaction,it takes 48 minutes for the concentration of the reactant to decrease to 25% of its initial value.What is the value for rate constant (in s^-1) for the reaction?

What is the overall reaction order for the reaction that has the rate law: Rate = k[Cl]²[N₂]^?

For a reaction that follows the general rate law,Rate = k[A][B]²,what will happen to the rate of reaction if the concentration of B is increased by a factor of 1.50? The rate will

For a reaction that follows the general rate law,Rate = k[A][B]²,what will happen to the rate of reaction if the concentration of A is increased by a factor of 1.50? The rate will

For the reaction shown below,what is the relationship between the rate of formation of Br₂ and the rate of reaction of ClO₂^-over the same time period? ClO₂^-(aq) + 4 Br^-(aq) + 4 H⁺(aq) → Cl^-(aq) + 2 Br₂(aq) +2 H₂O(l)

If the units for rate are M s^-1,what are the units for the rate constant,k,if the overall order of the reaction is five?

For the zeroth-order reaction: A → products,what will happen to the rate of reaction if the concentration of A is tripled?

Which term describes the measure of the decrease in the concentration of a product per unit time?

For the zeroth-order reaction: C → products,-Δ[C]/Δt = k,which of the following graphs would be expected to give a straight line?

Given the following hypothetical reaction: 2 E(g) + F(g) + G(g) → products.If the rate law is: Rate = k[E]²[F]^-1,what is the overall order of reaction?

The reaction below is first order in H₂ and second order in NO.What is the rate law for this reaction? 2 H₂(g) + 2 NO(g) → N₂(g) + 2 H₂O(g)

Which statement is true for the general rate law: Rate = k[A]^m[B]ⁿ?

Given the following hypothetical reaction: 2 E(g) + F(g) + G(g) → products.If the rate law is: Rate = k[E][F]^-1,what is the order of reaction with respect to E?

"Instantaneous rate" is defined as the

Quiz 13: Chemical Kinetics

For the reaction shown below,what is the order of reaction with respect to Br? ClO2-(aq) + 4 Br-(aq) + 4 H+(aq) → Cl-(aq) + 2 Br2(aq) +2 H2O(l)

Cerium(IV) ion reacts with thallium(I) ion in a one-step reaction shown below. 2 Ce4+(aq) + Tl+(aq) → 2 Ce3+(aq) + Tl3+(aq) If the rate law is: Rate = k[Ce4+]4[Tl+]2,what is the overall order of the reaction?

Hydroquinone,HOC6H6OH,can be formed by the reaction with acetylene below: 2 HCCH + 3 CO + H2O → HOC6H4OH + CO2 How is the rate of disappearance of acetylene,HCCH,related to the appearance of hydroquinone? - = ?

The reaction shown below has the rate law: Rate = k[BrO3-][Br-][H+]2. BrO3-(aq) + 5 Br-(aq) + 6 H+(aq) → 3 Br2(aq) + 3 H2O(l) What is the order of reaction with respect to Br -?

If the units for rate are M s-1,what are the units for the rate constant,k,for a zeroth-order reaction?

For a particular first-order reaction,it takes 48 minutes for the concentration of the reactant to decrease to 25% of its initial value.What is the value for rate constant (in s-1) for the reaction?

What is the overall reaction order for the reaction that has the rate law: Rate = k[Cl ]2[N2]?

For a reaction that follows the general rate law,Rate = k[A][B]2,what will happen to the rate of reaction if the concentration of B is increased by a factor of 1.50? The rate will

For a reaction that follows the general rate law,Rate = k[A][B]2,what will happen to the rate of reaction if the concentration of A is increased by a factor of 1.50? The rate will

For the reaction shown below,what is the relationship between the rate of formation of Br2 and the rate of reaction of ClO2- over the same time period? ClO2-(aq) + 4 Br-(aq) + 4 H+(aq) → Cl-(aq) + 2 Br2(aq) +2 H2O(l)

If the units for rate are M s-1,what are the units for the rate constant,k,if the overall order of the reaction is five?

For the zeroth-order reaction: A → products,what will happen to the rate of reaction if the concentration of A is tripled?

Which term describes the measure of the decrease in the concentration of a product per unit time?

For the zeroth-order reaction: C → products,-Δ[C]/Δt = k,which of the following graphs would be expected to give a straight line?

Given the following hypothetical reaction: 2 E(g) + F(g) + G(g) → products.If the rate law is: Rate = k[E]2[F]-1,what is the overall order of reaction?

The reaction below is first order in H2 and second order in NO.What is the rate law for this reaction? 2 H2(g) + 2 NO(g) → N2(g) + 2 H2O(g)

Which statement is true for the general rate law: Rate = k[A]m[B]n?

Given the following hypothetical reaction: 2 E(g) + F(g) + G(g) → products.If the rate law is: Rate = k[E] [F]-1,what is the order of reaction with respect to E?

"Instantaneous rate" is defined as the

For the reaction shown below,what is the order of reaction with respect to Br^? ClO₂^-(aq) + 4 Br^-(aq) + 4 H⁺(aq) → Cl^-(aq) + 2 Br₂(aq) +2 H₂O(l)

Cerium(IV) ion reacts with thallium(I) ion in a one-step reaction shown below. 2 Ce⁴⁺(aq) + Tl⁺(aq) → 2 Ce³⁺(aq) + Tl³⁺(aq) If the rate law is: Rate = k[Ce⁴⁺]⁴[Tl⁺]²,what is the overall order of the reaction?

Hydroquinone,HOC₆H₆OH,can be formed by the reaction with acetylene below: 2 HCCH + 3 CO + H₂O → HOC₆H₄OH + CO₂ How is the rate of disappearance of acetylene,HCCH,related to the appearance of hydroquinone? - = ?

The reaction shown below has the rate law: Rate = k[BrO₃^-][Br^-][H⁺]². BrO₃^-(aq) + 5 Br^-(aq) + 6 H⁺(aq) → 3 Br₂(aq) + 3 H₂O(l) What is the order of reaction with respect to Br^-?

If the units for rate are M s^-1,what are the units for the rate constant,k,for a zeroth-order reaction?

For a particular first-order reaction,it takes 48 minutes for the concentration of the reactant to decrease to 25% of its initial value.What is the value for rate constant (in s^-1) for the reaction?

What is the overall reaction order for the reaction that has the rate law: Rate = k[Cl]²[N₂]^?

For a reaction that follows the general rate law,Rate = k[A][B]²,what will happen to the rate of reaction if the concentration of B is increased by a factor of 1.50? The rate will

For a reaction that follows the general rate law,Rate = k[A][B]²,what will happen to the rate of reaction if the concentration of A is increased by a factor of 1.50? The rate will

For the reaction shown below,what is the relationship between the rate of formation of Br₂ and the rate of reaction of ClO₂^-over the same time period? ClO₂^-(aq) + 4 Br^-(aq) + 4 H⁺(aq) → Cl^-(aq) + 2 Br₂(aq) +2 H₂O(l)

If the units for rate are M s^-1,what are the units for the rate constant,k,if the overall order of the reaction is five?

Given the following hypothetical reaction: 2 E(g) + F(g) + G(g) → products.If the rate law is: Rate = k[E]²[F]^-1,what is the overall order of reaction?

The reaction below is first order in H₂ and second order in NO.What is the rate law for this reaction? 2 H₂(g) + 2 NO(g) → N₂(g) + 2 H₂O(g)

Which statement is true for the general rate law: Rate = k[A]^m[B]ⁿ?

Given the following hypothetical reaction: 2 E(g) + F(g) + G(g) → products.If the rate law is: Rate = k[E][F]^-1,what is the order of reaction with respect to E?