WorksheetsChemical Equilibrium DK014
Total questions: 20
Worksheet time: 2hrs 40mins
Which is the reactant - and why?
A, since the concentration decreases
B, since the concentration decreases
A, since the concentration increases
B, since the concentration increases
What is the equilibrium-constant expression for
CO2(g) + H2(g) ⇌ CO(g) + H2O(l)
Kc= [CO][H2O] / [CO2][H2]
Kc= [CO2][H2] / [CO]
Kc= [CO2][H2] / [CO][H2O]
Kc= [CO] / [CO2][H2]
Consider the following reaction. What would be the equilibrium constant expression?
4Br2(g) + CH4(g) ⇌ 4HBr(g) + CBr4(g)
[Br2]4 [CH4]/ [HBr]4 [CBr4]
[HBr]4 [CBr4]/ [Br2]4 [CH4]
[HBr ]/ [Br2]4 [CH4]
[HBr]4 [CBr4]/ [Br2]4 [CH]4
Given the equation:
CO2(g) + H2(g) ⇌ CO(g) + H2O(l)
This is
Homogeneous Equilibrium
Heterogeneous Equilibrium
The concentration @ pressure of ____ and ____ are NOT included in the equilibrium constant expression, Kc and Kp.
solid, gas
gas, aqueous
gas, liquid
solid, liquid
Choose the correct statement for homogeneous equilibrium.
Reactants and products are in different phases.
Products and reactants are in the same phase.
C(s) + O2(g) ⇌ CO2(g) is the example of homogeneous equilibrium.
Such reactions which continue in both directions are called:
Irreversible reactions
Reversible reactions
Non-reactive reactions
dynamic reactions
A complete reaction is in which:
All the reactants convert into products
All the reactants do not convert into products
Half reactants convert into products
only 10% reactants convert into products
Fe3O4(s) + 4H2(g) <=> 3Fe(s) + 4H2O(g)
Kc =
Which of the following is TRUE for a system that is in dynamic equilibrium?
The forward reaction goes to 100% completion.
The reaction rate of the forward reaction approaches zero.
The concentration of products is equal to the concentration of the reactants.
none of the above
A chemical equilibrium exists when:
reactants are completely changed to products.
there are equal amounts of reactants and products.
the rate at which reactants form products becomes zero.
the rate at which reactants form products is the same as the rate at which products form reactants
