11A - Reaction Orders - Graphs

Question 1

What is the characteristic of a zero-order reaction concerning the concentration of the reactant over time?

Answer 1

In a zero-order reaction, the concentration of the reactant is inversely proportional to time, meaning it decreases as time increases.

Question 2

What is the rate equation for a zero-order reaction?

Answer 2

For a zero-order reaction, the rate equation is rate = k, where k is the rate constant.

Question 3

What does a first-order reaction look like on a concentration-time graph?

Answer 3

A first-order reaction is represented by a curve on a concentration-time graph that decreases with time and eventually plateaus.

Question 4

How does the concentration decrease in a second-order reaction compared to a first-order reaction?

Answer 4

In a second-order reaction, the concentration decreases more steeply with time compared to a first-order reaction.

Question 5

How does the half-life change for zero-order, first-order, and second-order reactions?

Answer 5

The successive half-lives decrease with time for a zero-order reaction, remain constant for a first-order reaction, and increase with time for a second-order reaction.

Question 6

What does the rate-concentration graph of a first-order reaction look like?

Answer 6

The rate-concentration graph of a first-order reaction is a straight line showing a direct proportionality between rate and the concentration of the reactant.

Question 7

What does the rate-concentration graph of a second-order reaction look like?

Answer 7

The rate-concentration graph of a second-order reaction is a curved line indicating a direct proportionality between rate and the square of the concentration of the reactant.