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WorksheetsCHEMICAL EQUILIBRIUM
Total questions: 10
Worksheet time: 5mins
The following reaction aA + bB produce cC + dD.
The realtion that determine the equilibirum constant, Kc is known as
Law of active mass.
Law of mass action.
Law of chemical reactions.
Law of conservation of mass.
Which of the following statements is CORRECT for a reaction at an equilibrium?
The rate of forward and reverse reactions are equal.
The final concentrations of product and reactant are equal.
The initial concentrations of product and reactant are equal.
The rate constant of the forward and reverse reactions are equal.
For the graph, choose the CORRECT statement.
The rate of reaction slowly increase
The systems never reach equilibrium
At equilibrium, more NO2 is present than N2O4.
At start of reaction, only NO2 was present.
Equilibria in which all substances are in the same phases are called
dynamic equilibrium.
equilibrium constant.
homogeneous equilibria.
heterogeneous equilibria.
For the reaction, choose the CORRECT equilibrium constant, Kc.
From the reaction, choose the CORRECT equilibrium constant, Kp.
Choose the CORRECT sentence to complete the following Le Chatelier's principle.
"If a chemical system at equilibrium is disturbed, the system will..."
not respond in any way unless a significant change in temperature is made.
stop the chemical reaction and resume only after the disturbance is removed.
shift its equilibrium position in the direction that reduces the effect of the disturbance.
shift its equilibrium position that returns all reactants and products to their original concentrations.
Consider the following reversible reaction, the equilibrium mixture is a PURPLE colour.
According to the Le Chatelier's principle, what will happen to the mixture if concentration HCl is added?
It will turn blue as [CoCl4]2- is being formed
It will turn pink as more [Co(H2O)6]2+ is being formed
It stays purple as addition of HCl has no effect on equilibrium
it will turn pink as equilibrium position shifts to the right.
What will happen if the total pressure is increase by decreasing the volume?
No shift in equilibrium will occur.
Equilibrium shifts to the left, in favour of less number of moles of gas.
Equilibrium shifts to the right, in favour of more number of moles of gas.
Equilibrium shifts to both directions because there are equal number of moles of gas.
Choose the CORRECT statement that describes the function of catalyst in chemical equilibrium.
It increases the amount of product formed.
It increases the rate at which equilibrium is achieved.
It changes the value of the equilibrium constant for a reaction.
It changes the equilibrium position.
