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Worksheetschemical equilibrium
Total questions: 15
Worksheet time: 18mins
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]
CO2(g) + H2(g) ↔ CO(g) + H2O(l)
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
Which of the following is the condition needed to establish the equilibrium?
Constant Temperature
Products and reactants should be in constant dynamic motion
All reactants and products should be in closed system
All of the above
What is the value for Kc if [CO] = 0.025, [H2] = 0.013 and [CH3OH] = 0.0028 for the following reaction?
CH3OH(g) ⇌ CO(g) + 2 H2(g)
0.12
9.1 × 10-7
6.6 × 102
1.5 × 10-3
8.6
What is the correct formula for the equilibrium constant
K = ReactantsProducts
K = ProductsReactants
What is a characteristic of a system in equilibrium except ?
Occurs only in closed system
Concentration of product and reactant not change
Concentration of product appearing per unit time
Rate of forward reaction equals the rate of reverse reaction
Determine whether the following reactions are homogeneous
3Fe(s)+4H2O(1)=Fe3O4(s)+4H2(g)
FeO(s) + CO(g) =Fe(s) +CO2(g)
2PCl3(g)+O2(g)=2POCl3(g)
Ag+(aq) +Fe2+(aq) =Ag(s) +Fe3+(aq)
When all reactants and products have the same physical state, then the reaction is called
Heterogeneous equilibrium
Homogeneous equilibrium
Fe3O4(s) + 4H2(g) <=> 3Fe(s) + 4H2O(g)
Kc =
