Which of the following statements regarding a chemical reaction at equilibrium is always correct?
A - Scottish Highers Chemistry - Question 18 - 2015
Question 18
Which of the following statements regarding a chemical reaction at equilibrium is always correct?
A. The rates of the forward and reverse reactions are equal.
B. T... show full transcript
Worked Solution & Example Answer:Which of the following statements regarding a chemical reaction at equilibrium is always correct?
A - Scottish Highers Chemistry - Question 18 - 2015
Step 1
A. The rates of the forward and reverse reactions are equal.
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Answer
This statement is correct. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction, although the concentrations of reactants and products may not be equal.
Step 2
B. The concentration of reactants and products are equal.
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Answer
This statement is incorrect. At equilibrium, concentrations of reactants and products can differ; they are not necessarily equal.
Step 3
C. The forward and reverse reactions have stopped.
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Answer
This statement is incorrect. At equilibrium, both the forward and reverse reactions continue to occur, but their rates are equal.
Step 4
D. The addition of a catalyst changes the position of the equilibrium.
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Answer
This statement is incorrect. A catalyst speeds up the attainment of equilibrium but does not change the position of equilibrium.
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