1. Write equilibrium expressions for each of the following equilibria: (a) 2 C(s) + O;(g)22 CO(g) (b) Zn²*(aq) + H;S(g)²ZnS(s) + 2 H*(aq) (c) HCl(g) + H;O(()2H;O*(aq) + ClI (aq) (d) H;(g) + ÷ O;(g)²H;O(g)
1. Write equilibrium expressions for each of the following equilibria: (a) 2 C(s) + O;(g)22 CO(g) (b) Zn²*(aq) + H;S(g)²ZnS(s) + 2 H*(aq) (c) HCl(g) + H;O(()2H;O*(aq) + ClI (aq) (d) H;(g) + ÷ O;(g)²H;O(g)
Chemistry
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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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1.
Write equilibrium expressions for each of the following
equilibria:
(a) 2 C(s) + O;(g)22 CO(g)
(b) Zn²*(aq) + H,S(g)2ZnS(s) + 2 H*(aq)
(c) HCl(g) + H,O(e)2H;O*(aq) + Cl^(aq)
(d) H;(g) + O,(g)2H,O(g)
2.
The equilibrium constant for the reaction, 3 H;(g) + N2(g)
22 NH;(g), at a given temperature is 1.4 x 10-7. Calcu-
late the equilibrium concentration of ammonia, if [H2] =
1.2 × 10-2 molL- and [N2] = 3.2 × 10-³ mol L-!.
12
3.
Hydrogen gas and iodine gas react via the following
equation:
H;(g) + I;(g) 2 2 HI(g)
K. = 76 (at 600 K)
If 0.050 mol HI is placed in an empty 1.0-L flask at
600 K, what are the equilibrium concentrations of HI, Iz,
and H2?
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1.
Write equilibrium expressions for each of the following
equilibria:
(a) 2 C(s) + O;(g)22 CO(g)
(b) Zn²*(aq) + H,S(g)2ZnS(s) + 2 H*(aq)
(c) HCl(g) + H,O(e)2H;O*(aq) + Cl^(aq)
(d) H;(g) + O,(g)2H,O(g)
2.
The equilibrium constant for the reaction, 3 H;(g) + N2(g)
22 NH;(g), at a given temperature is 1.4 x 10-7. Calcu-
late the equilibrium concentration of ammonia, if [H2] =
1.2 × 10-2 molL- and [N2] = 3.2 × 10-³ mol L-!.
12
3.
Hydrogen gas and iodine gas react via the following
equation:
H;(g) + I;(g) 2 2 HI(g)
K. = 76 (at 600 K)
If 0.050 mol HI is placed in an empty 1.0-L flask at
600 K, what are the equilibrium concentrations of HI, Iz,
and H2?
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4.
Consider the following system:
4 NH;(g) + 3 O;(g)22 N;(g) + 6 H;O(€)
AH = -1530.4 kJ
(a) How will the amount of ammonia at equilibrium be
affected by
(1) removing O2(g)?
(2) adding N;(g)?
(3) adding water?
(4) expanding the container at constant pressure?
(5) increasing the temperature?
(b) Which of the above factors will increase the value of
K? Which will decrease it?
5.
Nitrosyl chloride, NOCI, decomposes to NO and Cl, at
high temperatures:
2 NOCI(g)22 NO(g) + Cl;(g)
Suppose you place 2.00 mol NOCI in a 1.00-L flask and
raise the temperature to 462°C. When equilibrium has
been established, 0.66 mol NO is present. Calculate the
equilibrium constant K, for the decomposition reaction
from these data.
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