AP Chemistry Unit 4-5 Test

D. ln[AX] vs. time

1. If the reaction 2AX --> A2 + X2 is FIRST order, which of the following will yield a linear plot?

C. [AX] vs. time

1. If the reaction 2AX --> A2 + X2 is ZERO order, which of the following will yield a linear plot?

C. Y appears at three times the rate that X disappears

3A + 2X = 6Y The reaction above takes place with all of the reactants and products in the gaseous phase. Which of the following is true of the relative rates of disappearance of the reactants and appearance of the products?

C. 3.2x10^-2

A general reaction written as A + @B --> C + 2D is studied and yields the following data: Determine the initial rate of B consumption for the SECOND trail

D. 6.4x10^-2

A general reaction written as A + @B --> C + 2D is studied and yields the following data: Determine the initial rate of B consumption for the THIRD trail

C. LiH + H2O --> LiOH + H2

A redox reaction where hydrogen is oxidized.

C. The decomposition of N2O4 is a second-order reaction

A sample of N2O4 was placed in an evacuated container, and the reaction represented above occurred. The value of P, the partial pressure of N2O4, was measured during the reaction and recorded in the table below

B or C. NH4 is a stronger acid than H2O is

A strong smell of ammonia, NH3, is observed at the end of the reaction above. Which of the following statements is true?

B or A. The resulting solution is cloudy

A student had two dilute, colorless solutions, A and X, which were at the same temperature. The student combined the solutions, and a reaction occurred. Which of the following results would be evidence that a chemical reaction took place?

B. rate = k[A]2[b]

Based on the experimental data, what is the rate law for the hypothetical reaction given above? Initial Rate 2 4 3.2

A. rate = k[A][B]2

Based on the experimental data, what is the rate law for the hypothetical reaction given above? Initial Rate 2 8 6.4

C or D. rate = k[O3][Cl]

Based on the proposed mechanism, which of the following is the rate-law expression for the destruction of O3?

B. 1.88 moles

In the reaction represented above, what is the total number of moles of reactants consumed when 1.25 MOLES of H2O is produced?

C. 2.25 moles

In the reaction represented above, what is the total number of moles of reactants consumed when 1.5 MOLES of H2O is produced?

C. 16

M - 1st N - 1st O - 2nd The rate of a certain chemical reaction between substances M, N, and X obeys the rate law above. The reaction is first studied with [M], [N], and [X] each 1x10^-3 M. If a new experiment is conducted with [M], [N], and [X] each 2x10^-3 M, the reaction rate will increase by a factor of...

D. 32

M - 1st N - 2nd X - 2nd The rate of a certain chemical reaction between substances M, N, and X obeys the rate law above. The reaction is first studied with [M], [N], and [X] each 1x10^-3 M. If a new experiment is conducted with [M], [N], and [X] each 2x10^-3 M, the reaction rate will increase by a factor of...

C. 2Al + 3Ni = 2Al + 3Ni

Ni + 2e = Ni Al = Al + 3e Which of the following is the balanced net ionic equation for an oxidation-reduction reaction between Ni2+ and Al based on the half-reactions represented above?

C or B. rate = k[O2][NO]2

The following data were obtained for the reaction of O2 with NO What is the rate law?

B. (gray/white & Black/3white)

The particle diagram to the right represents an aqueous solution of a weak monoprotic acid. The white circles represent H atoms. Which of the following shows the species that act as a Bronsted-lowry ACID and the conjugate ACID in the solution?

D. (gray & black/2white)

The particle diagram to the right represents an aqueous solution of a weak monoprotic acid. The white circles represent H atoms. Which of the following shows the species that act as a Bronsted-lowry BASE and the conjugate BASE in the solution?

C. (white circle)

The particle models shown to the right represent a proposed two step mechanism for the destruction of ozone in the upper atmosphere based on the models, which of the following is an CATALYST for the reaction?

D. (white and grey circle)

The particle models shown to the right represent a proposed two step mechanism for the destruction of ozone in the upper atmosphere based on the models, which of the following is an INTERMEDIATE for the reaction?

A. ln[M] vs. hours

The rate constant (k) is 3.6x10^-3. 1/HOURS. The slope of which of the following graphs is correct for the reaction and could be used to confirm the value of k?

B. 1/[M] vs. hours

The rate constant (k) is 3.6x10^-3. 1/M * HOURS. The slope of which of the following graphs is correct for the reaction and could be used to confirm the value of k?

A or B (I or II). A + B = E (fast) E + A = C + D. (slow)

The rate law for a reaction is found to be Rate=k[A]2[B], Which of the following mechanisms gives this rate law?

B or C. A + X2 --> AX2

The rate law for the reaction represented by the equation above is first order in both reactants. Which of the following could be the first elementary step of a two-step mechanism for the reaction if the first step is slow and the second step is fast?

A or B. (tall then short)

When free Cl(g) atoms encounter O3 molecules in the upper atmosphere, the following reaction mechanism is proposed to occur. Which of the following reaction energy profiles best corresponds to the proposed mechanism?

C or D. At a higher temperatures, high-energy collisions happen more frequently

Which of the following best helps explain why an increase in temperature increases the rate of a chemical reaction

B or D. F + h --> HF

Which of the following is the net ionic equation for the reaction between aqueous sodium fluoride and nitric acid?

D. The presence of a catalyst in path two

Which of the following most likely accounts for the difference between reaction path one and reaction path two?

D. Rate =k[NO]2[Cl]

Which of the following rate laws is consistent with the reaction mechanism shown above?

B. Fe --> Fe + e

Which of the following represents the OXIDATION half-reaction based on the balanced ionic equation shown above?

C. MNO + 5e --> MN2

Which of the following represents the REDUCTION half-reaction based on the balanced ionic equation shown above?