WorksheetsChemical Equilibrium
Total questions: 20
Worksheet time: 24mins
The forward reaction forms the substance __________.
SO2 + O2 <−> SO3
If the concentration of SO2 is increased, the equilibrium of the reaction will shift ___________.
SO2 + O2 <−> SO3
If the equilibrium shifts to the right, the concentration of O2 will ___________.
heat + N2 + O2 <−> 2NO
If NO is removed from the system, the concentration of N2 will _______.
H2 (g) + Cl2 (g) <−> 2HCl (g) + heat
If the temperature is cooled, the _________ reaction will be favored.
N2 (g) + 3 H2 (g) <−> 2 NH3 (g)
If the pressure in the system is increased, which substance will increase in concentration?
What is the effect of increasing the pressure on the following equilibrium: 2NO(g) + O2 (g) ⇌2NO2(g)?
The yield of NO2 increases
The yield of NO2 decreases
The reaction is slower
The concentration of O2 increases.
At elevated temperatures ammonium carbonate, NH2COONH4, is in equilibrium with NH3 and CO2 according to the equation;
NH2COONH4(s) ↔ 2 NH3(g) + CO2(g)
What is the equilibrium expression for this reaction?
K = 2 [NH3][CO2]
[NH2COONH4]
K = [NH3]2[CO2]
[NH2COONH4]
K = 2 [NH3][CO2]
K = [NH3]2[CO2]
Decreasing volume of container will
For the following reaction: H2(g) + Cl2 (g) ↔ 2HCl(g), calculate the concentration of HCl when Keq= 2.3x10-5, [H2]= 0.0056mol, [Cl2]= 0.0048mol.
6.2 x 10-10 M
2.5 x 10-5 M
1.1 M
1.2 M
PCl3 (g) + Cl2 (g) ↔ PCl5 (g) + energy
Which of the following causes an increase in the moles of PCl5 present at equilibrium shown?
decreasing the volume of the container
raising the temperature
adding a mole of He gas at constant volume
adding a mole of He gas at constant pressure
What kind of equilibrium does the reaction below show?
H2(g) +I2(g) ↔ 2HI(g)
Heterogeneous equilibrium, all the reactants and products are in the same physical state.
Homogeneous equilibrium, all the reactants and products are in the same physical state.
Heterogeneous equilibrium, the reactants and products are present in more than one physical state
Homogeneous equilibrium, the reactants and products are present in more than one physical state
heat + N2 + O2 <−> 2NO
If the heat is removed from the chemical system, the concentration of N2 will _______.
H2 (g) + Cl2 (g) <−> 2HCl (g) + heat
If the pressure in the system is increased, the equilibrium will _______.
H2(g)+Cl2(g)⇌2HCl(g)
The forward reaction is exothermic. What will happen to the equilibrium if the temperature is increased?
equilibrium shifts right
equilibrium shifts left
You cannot predict the effect
no change
