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AP 5.9 Steady State Approximation BANK

Authored by Tod Elford

Chemistry

11th Grade

NGSS covered

Used 2+ times

AP 5.9 Steady State Approximation BANK
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Rate=k[Br2][NO]

Rate=k[Br2][NO]2

Rate=k[Br2]2[NO]

Rate=k[NOBr2][NO]

Tags

NGSS.HS-PS1-5

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2 NO(g) + O2(g)   2 NO2(g)

Consider the following mechanism for the reaction represented above.

Step 1: 2 NO   ⇄  N2O2              (fast reversible)

Step 2: N2O2 + O2   →   2 NO2         (slow)

Which of the following statements is true?

Step 1 represents a unimolecular reaction.

Increasing the concentration of NO will decrease the overall rate of the reaction.

Raising the temperature will have no effect on the numerical value of the rate constant.

The rate law that is consistent with the mechanism is rate = k[NO]2[O2].

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-7

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tags

NGSS.HS-PS1-5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Step 1. N2H2O2 ⇄ N2HO2 + H+       (fast equilibrium)

Step 2. N2HO2 → N2O + OH        (slow)

Step 3. H+ + OH → H2O                (fast)

Nitramide, N2H2O2, decomposes slowly in aqueous solution. This decomposition is believed to occur according to the reaction mechanism above. The rate law for the decomposition of nitramide that is consistent with this mechanism is given by which of the following?

Rate = k[N2H2O2]

Rate = k[N2H2O2] [H+]

Rate = k[N2H2O2] [OH-]

Tags

NGSS.HS-PS1-5

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2H2(g)+2NO(g)→N2(g)+2H2O(g)

For the chemical reaction represented above, the following mechanism is proposed.

Step 1:2NO(g)⇌N2O2(g) (fast equilibrium)

Step 2:N2O2(g)+H2(g)→N2O(g)+H2O(g) (slow)

Step 3:N2O(g)+H2(g)→N2(g)+H2O(g) (fast)

Which of the following initial rate law expressions is consistent with this proposed mechanism?

Rate=k[H2]2[NO]2

Rate=k[NO]2

Rate=k[H2][NO]2

Rate=k[H2][N2O]2

Tags

NGSS.HS-PS1-5

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Consider the following mechanism:

A2 + B2 ↔ R + C (fast)

A2 + R → C (slow)

What is the overall simplified balanced equation?

A2 + B2 → R + C

A2 + R → C

2A2 + B2 → 2C

2A2 + B2 → C

2A2 + 2B2 → 2C

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2

7.

MULTIPLE CHOICE QUESTION

3 mins • 2 pts

Consider the following mechanism:

A2 + B2 ↔ R + C (fast)

A2 + R → C (slow)

What is the rate law?

=k[A]2[B]2

=k[A2][B2]

=k[A2]2[B2][C]

Tags

NGSS.HS-PS1-5

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