The equation X + Y 2Z has the rate law equation shown below. Which of the following statements best describes the relationship of X on the rate of the reaction? rate = k[X]2[Y]

Changing X has no effect on the reaction rate.

Doubling X causes the reaction rate to quadruple.

Dividing X by two causes the reaction rate to be cut in half.

Multiplying X by three also increases the reaction rate by three times.

Question

Cisco

Chemistry

Today, 04:52

The equation X + Y 2Z has the rate law equation shown below. Which of the following statements best describes the relationship of X on the rate of the reaction? rate = k[X]2[Y]

Changing X has no effect on the reaction rate.

Doubling X causes the reaction rate to quadruple.

Dividing X by two causes the reaction rate to be cut in half.

Multiplying X by three also increases the reaction rate by three times.

+2

Answers (1)

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Fleming · Answer 1

The order of the reaction with respect to X is 2.

The statements given;

1. As Concentration of X is in the rate law equation, changing X will have an effect on the rate of the equation.

2. Rate is proportional to X^2

So if concentration of X is doubled, then rate proportional to (2X) ^2 = 4X^2

Rate therefore quadruples when X is doubled

This statement is correct

3. If we divide X/2 then the effect to the rate is (X/2) ^2 = X/4. This will reduce the rate by quarter not half. This statement is wrong.

4. If we multiply by 3

Then rate proportional to (3X) ^2 = 9X^2

Rate increases by 9 times. This statement is wrong