Which of the following best describes a chemical reaction in a state of equilibr
ID: 877050 • Letter: W
Question
Which of the following best describes a chemical reaction in a state of equilibrium?
Both the forward and the reverse reactions do not occur.
The rates of the forward and reverse reactions are equal.
The concentrations of the reactants equal the concentrations of the products.
All of one reactant has been consumed.
The value of the equilibrium constant is 1
2.
Consider the following endothermic reaction at equilibrium in a 1-liter container:
2Cl2(g) + 2H2O(g) <----> 4HCl(g) + O2(g) H > 0
Which of the following will cause a decrease in the equilibrium concentration of Cl2?
Lowering the temperature
Adding H2O gas
Adding HCl gas
Adding O2 gas
Reducing the volume of the container
Both the forward and the reverse reactions do not occur.
The rates of the forward and reverse reactions are equal.
The concentrations of the reactants equal the concentrations of the products.
All of one reactant has been consumed.
The value of the equilibrium constant is 1
2.
Consider the following endothermic reaction at equilibrium in a 1-liter container:
2Cl2(g) + 2H2O(g) <----> 4HCl(g) + O2(g) H > 0
Which of the following will cause a decrease in the equilibrium concentration of Cl2?
Lowering the temperature
Adding H2O gas
Adding HCl gas
Adding O2 gas
Reducing the volume of the container
Explanation / Answer
1) The rates of the forward and reverse reactions are equal.
2) Adding H2O gas
reason : on addition of reactant the concentration of reactnats decreases and on addition of products the concentration of products decreases. so on additon of H2O reactant concentration Cl2 decreases.
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