Mr Cole Chemistry

Equilibrium Moles Questions

Equilibrium Moles

Equilibria Worksheet

1. Determine the equilibrium number of moles for all the substances in the equilibrium.

3O2(g) ⇌ 2O3(g)
Initial Moles 2.0 0.0
Change
Equilibrium Moles 0.6
3O2(g) ⇌ 2O3(g)
Initial Moles 2.0 0.0
Change -0.9 +0.6
Equilibrium Moles 1.1 0.6

2. Determine the equilibrium number of moles for all the substances in the equilibrium.

N2O4(g) ⇌ 2NO2(g)
Initial Moles 3.5 0.0
Change
Equilibrium Moles 2.1
N2O4(g) ⇌ 2NO2(g)
Initial Moles 3.5 0.0
Change -1.05 +2.1
Equilibrium Moles 2.45 2.1

3. Determine the equilibrium number of moles for all the substances in the equilibrium.

PCl5(g) ⇌ PCl3(g) + Cl2(g)
Initial Moles 5.0 0.0 0.0
Change
Equilibrium Moles 2.6
PCl5(g) ⇌ PCl3(g) + Cl2(g)
Initial Moles 5.0 0.0 0.0
Change -2.6 +2.6 +2.6
Equilibrium Moles 2.4 2.6 2.6

4. Determine the equilibrium number of moles for all the substances in the equilibrium.

C2H4(g) + H2O(g) ⇌ C2H5OH(g)
Initial Moles 1.5 1.5 0.0
Change
Equilibrium Moles 0.9
C2H4(g) + H2O(g) ⇌ C2H5OH(g)
Initial Moles 1.5 1.5 0.0
Change -0.9 -0.9 +0.9
Equilibrium Moles 0.6 0.6 0.9

5. Determine the equilibrium number of moles for all the substances in the equilibrium.

H2(g) + Br2(g) ⇌ 2HBr(g)
Initial Moles 2.0 1.5 0.0
Change
Equilibrium Moles 1.8
H2(g) + Br2(g) ⇌ 2HBr(g)
Initial Moles 2.0 1.5 0.0
Change -0.9 -0.9 +1.8
Equilibrium Moles 1.1 0.6 1.8

6. Determine the equilibrium number of moles for all the substances in the equilibrium.

2SO2(g) + O2(g) ⇌ 2SO3(g)
Initial Moles 1.5 1.2 0.0
Change
Equilibrium Moles 1.3
2SO2(g) + O2(g) ⇌ 2SO3(g)
Initial Moles 1.5 1.2 0.0
Change -1.3 -0.65 +1.3
Equilibrium Moles 0.2 0.55 1.3

7. Determine the equilibrium number of moles for all the substances in the equilibrium.

BiCl3(aq) + H2O(l) ⇌ BiOCl(s) + 2HCl(aq)
Initial Moles 1.5 1.2 0.0 0.0
Change
Equilibrium Moles 1.0
BiCl3(aq) + H2O(l) ⇌ BiOCl(s) + 2HCl(aq)
Initial Moles 1.5 1.2 0.0 0.0
Change -1.0 -1.0 +1.0 +2.0
Equilibrium Moles 0.5 0.2 1.0 2.0

8. Determine the equilibrium number of moles for all the substances in the equilibrium.

FeCl3(aq) + 3NH4SCN(aq) ⇌ Fe(SCN)3(aq) + 3NH4Cl(aq)
Initial Moles 4.0 8.0 0.0 0.0
Change
Equilibrium Moles 2.2
FeCl3(aq) + 3NH4SCN(aq) ⇌ Fe(SCN)3(aq) + 3NH4Cl(aq)
Initial Moles 4.0 8.0 0.0 0.0
Change -2.2 -6.6 +2.2 +6.6
Equilibrium Moles 1.8 1.4 2.2 6.6

9. Determine the equilibrium number of moles for all the substances in the equilibrium.

CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g)
Initial Moles 1.8 2.0 0.0 0.0
Change
Equilibrium Moles 2.4
CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g)
Initial Moles 1.8 2.0 0.0 0.0
Change -0.8 -0.8 +0.8 +2.4
Equilibrium Moles 1.0 1.2 0.8 2.4

10. Determine the equilibrium number of moles for all the substances in the equilibrium.

Cl2(g) + H2O(l) ⇌ HClO(aq) + HCl(aq)
Initial Moles 10.0 10.0 0.0 0.0
Change
Equilibrium Moles 8.5
Cl2(g) + H2O(l) ⇌ HClO(aq) + HCl(aq)
Initial Moles 10.0 10.0 0.0 0.0
Change -8.5 -8.5 +8.5 +8.5
Equilibrium Moles 1.5 1.5 8.5 8.5

11. Determine the equilibrium number of moles for all the substances in the equilibrium.

N2(g) + 3H2(g) ⇌ 2NH3(g)
Initial Moles 15.0 30.0 0.0
Change
Equilibrium Moles 12.0
N2(g) + 3H2(g) ⇌ 2NH3(g)
Initial Moles 15.0 30.0 0.0
Change -6.0 -18.0 +12.0
Equilibrium Moles 9.0 12.0 12.0

12. Determine the equilibrium number of moles for all the substances in the equilibrium.

4NH3(g) + 5O2(g) ⇌ 4NO(g) + 6H2O(g)
Initial Moles 15.0 15.0 0.0 0.0
Change
Equilibrium Moles 3.0
4NH3(g) + 5O2(g) ⇌ 4NO(g) + 6H2O(g)
Initial Moles 15.0 15.0 0.0 0.0
Change -3.00 -3.75 +3.00 +4.50
Equilibrium Moles 12.0 11.25 3.00 4.50
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