Self assessment
Question 1 of 5
The equilibrium between bismuth chloride and bismuth oxychloride can be represented by the equation:
BiCl3(aq) + H2O(l) BiOCl(s) + 2HCl(aq)
What would happen if the equilibrium mixture was diluted by a large volume of water?
A
The concentration of BiOCl(aq) would increase.
B
The concentration of BiCl3(aq) would increase.
C
A precipitate would form.
D
The mixture would become more acidic.
In which of the following reactions will an increase in pressure have no effect?
Reaction 1: 2NO(g) + O2(g) 2NO2(g)
Reaction 2: C2H6(g) C2H4(g) + H2(g)
Reaction 3: 2HI(g) H2(g) + I2(g)
Reaction 4: N2(g) + O2(g) 2NO(g)
A
Reaction 1.
B
Reaction 2.
C
Reaction 3.
D
Reaction 4.
Carbon monoxide and hydrogen form an equilibrium mixture with methanol:
CO(g) + 2H2(g) CH3OH(g)
Which of the following changes will result in the formation of more ethanol?
A
The concentration of CO(g) is decreased.
B
The partial pressure of hydrogen is doubled.
C
The volume in which the mixture is contained is reduced by half.
D
The total pressure of the mixture is increased.
Ethanol and ethanoic acid form an equilibrium mixture with ethyl ethanoate and water:
C2H5OH(l) + CH3COOH(aq) CH3COOC2H5(l) + H2O(l)
Some ethanol is added to the equilibrium mixture. A new equilibrium is established. How do the concentrations in the new and original mixtures compare?
A
The concentration of C2H5OH(aq) is the same.
B
The concentration of CH3COOC2H5(aq) decreases.
C
The concentration of CH3COOH(aq) decreases.
D
The concentrations of all of the components of the mixture change so that = Kc again.
An equilibrium can be represented by the equation A + B C + D
What happens to the rates of the forward and reverse reactions if the concentration of component A is suddenly increased?
A
There is no change to the rate of the forward or reverse reactions.
B
The rate of the forward reaction increases then decreases and then remains constant.
C
The rate of the forward reaction increases and then decreases but the rate of the reverse reaction does not change.
D
The rates of the forward and reverse reactions increase by the same amount.