An understanding of Le Chatelier's principle is useful in the chemical industry - VCE - SSCE Chemistry - Question 1 - 2019 - Paper 1
Question 1
An understanding of Le Chatelier's principle is useful in the chemical industry.
The prediction that can be made using this principle is the effect of
A. catalysts o... show full transcript
Worked Solution & Example Answer:An understanding of Le Chatelier's principle is useful in the chemical industry - VCE - SSCE Chemistry - Question 1 - 2019 - Paper 1
Step 1
A. catalysts on the rate of reaction.
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Answer
Le Chatelier's principle does not directly predict the impact of catalysts on the rate of reaction. Catalysts speed up the rate by lowering the activation energy, but they do not shift the position of equilibrium.
Step 2
B. changes in temperature on the rate of reaction.
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Answer
Changes in temperature affect the position of equilibrium, not merely the rate of reaction. Increasing temperature favors the endothermic direction, while lowering it favors the exothermic direction.
Step 3
C. changes in the concentration of reactants on the position of equilibrium.
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Answer
This statement aligns with Le Chatelier's principle. According to the principle, increasing the concentration of reactants shifts the equilibrium to the right, favoring product formation.
Step 4
D. catalysts on the position of equilibrium.
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Answer
This is incorrect because catalysts do not change the position of the equilibrium; they only speed up the reaction rate in both the forward and reverse directions equally.
