For a hypothetical reaction: A + 2B + C → D + E The rate law has been determined and is as follows: Rate = k[A][B]2 What happens to the reaction rate when we make each of the following concentration changes? a) We triple the concentration of A without changing the concentration of B or C. b) We triple the concentration of B without changing the concentration of A or C. c) We triple the concentration of C without changing the concentration of A or B.

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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For a hypothetical reaction:
A + 2B + C → D + E
The rate law has been determined and is as follows:
Rate = k[A][B]2
What happens to the reaction rate when we make each of the following concentration
changes?
a) We triple the concentration of A without changing the concentration of B or C.
b) We triple the concentration of B without changing the concentration of A or C.
c) We triple the concentration of C without changing the concentration of A or B.
d) We triple the concentrations of A, B and C simultaneously.
e) We triple the concentration of D.
Question 2 
Which of the following liquids are likely to be miscible with water: 1-propanol
(CH3CH2CH2OH), carbon tetrachloride (CCl4), hexane (C6H14), and acetic acid (CH3CO2H)?
Motivate your choice(s) using your knowledge of intermolecular forces.
Question 3 
3.1 During an experiment with the Haber process, a researcher determined that Kc =
9,60 at 300°C.
N2 (g) + 3 H2 (g) ↔ 2 NH3 (g)
Calculate Kp for this reaction at 300°C.
3.2 Given the following information:
HF (aq) ↔H
+
(aq) + F–
(aq) Kc = 6,8 x 10–4
H2C2O4 (aq) ↔ 2 H+
(aq) + C2O4
2–
(aq) Kc = 3,8 x 10–6
Determine the value of Kc for the reaction:
2
2 HF (aq) + C2O4
2–
(aq) ↔ F

(aq) + H2C2O4 (aq)
3.3 The following diagram represents the equilibrium state for the reaction:
A2 (g) + 2 B (g) ↔ 2 AB (g)
a) Assuming the volume is 1 dm3
, calculate the equilibrium constant for the reaction.
b) If the volume of the equilibrium mixture is decreased, will the number of AB
molecules increase or decrease? Say why.
c) Below are two diagrams showing a microscopic representation of the reaction:
X2 + Y ↔ X + XY
The diagrams represent the same reaction at two different temperatures: 300 K and
500 K. Is the reaction exothermic or endothermic? Say why.
Question 4 
The vapor pressure of pure water at 45 °C is 71,9 mm Hg. What is the vapor pressure of a
mixture of 21,0 g sucrose (C12H22O11, molar mass 342,3 g/mol) and 79,0 g water?

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