A mixture of 0.0565 mol phosphorus pentachloride, PCl 5 , and 0.0800 mol helium gas, He, was placed in a 1.000-L flask and heated to 250.0°C. The phosphorus pentachloride decomposes at this temperature to give phosphorus trichloride, PCl 3 , and chlorine gas, Cl 2 . The helium gas is inert. PCl 5 ( g ) ⇌ PCl 3 ( g ) + Cl 2 ( g ) What is the partial pressure of helium in this equilibrium mixture at 250.0°C? At equilibrium, the total pressure is found to be 6.505 atm. What is K c for the dissociation of PCl 5 ?
A mixture of 0.0565 mol phosphorus pentachloride, PCl 5 , and 0.0800 mol helium gas, He, was placed in a 1.000-L flask and heated to 250.0°C. The phosphorus pentachloride decomposes at this temperature to give phosphorus trichloride, PCl 3 , and chlorine gas, Cl 2 . The helium gas is inert. PCl 5 ( g ) ⇌ PCl 3 ( g ) + Cl 2 ( g ) What is the partial pressure of helium in this equilibrium mixture at 250.0°C? At equilibrium, the total pressure is found to be 6.505 atm. What is K c for the dissociation of PCl 5 ?
Solution Summary: The author explains the equilibrium constant, which is the ratio of the rate constants of forward and reverse reactions at a given temperature.
A mixture of 0.0565 mol phosphorus pentachloride, PCl5, and 0.0800 mol helium gas, He, was placed in a 1.000-L flask and heated to 250.0°C. The phosphorus pentachloride decomposes at this temperature to give phosphorus trichloride, PCl3, and chlorine gas, Cl2. The helium gas is inert.
PCl
5
(
g
)
⇌
PCl
3
(
g
)
+
Cl
2
(
g
)
What is the partial pressure of helium in this equilibrium mixture at 250.0°C? At equilibrium, the total pressure is found to be 6.505 atm. What is Kc for the dissociation of PCl5?
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6. Consider the following exothermic reaction below.
2Cu2+(aq) +41 (aq)2Cul(s) + 12(aq)
a. If Cul is added, there will be a shift left/shift right/no shift (circle one).
b. If Cu2+ is added, there will be a shift left/shift right/no shift (circle one).
c. If a solution of AgNO3 is added, there will be a shift left/shift right/no shift (circle one).
d. If the solvent hexane (C6H14) is added, there will be a shift left/shift right/no shift (circle
one). Hint: one of the reaction species is more soluble in hexane than in water.
e. If the reaction is cooled, there will be a shift left/shift right/no shift (circle one).
f. Which of the changes above will change the equilibrium constant, K?
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Chapter 14 Solutions
OWLv2 for Ebbing/Gammon's General Chemistry, 11th Edition, [Instant Access], 1 term (6 months)
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