C7.1 Measuring Rates Quiz

Rate of reaction is defined as the change in the ___________ of reactant or product per unit of time.

The piece of apparatus indicated by a red arrow is called a _________ tube.

In the experiment, the rate of the reaction is being measured by...

• recording the volume of gas at the start and the end of the experiment

• recording the volume of gas at the start and the end of the experiment and the time taken for the reaction to finish

• recording the volume of gas at set intervals of time

• recording the time taken for the reaction to finish

In which of the three experiments was the rate of reaction the greatest?

• 1

• 2

• 3

• None, they were all equal

Assuming the conditions, except surface area, in the three reactions were the same, in which experiment is the rate of reaction the greatest?

• large

• small chips

• powder

• It is not possible to tell from the information given

Answer explanation

If all of the conditions, i.e. mass of calcium carbonate, concentration of acid, and temperature, are the same then the reaction that finishes first will have the greatest rate.

In which reactions were the amounts of reactants used the same?

• 1 & 2

• 1 & 3

• 2 & 3

• 1, 2 & 3

Answer explanation

Reactions 1 & 3 produce the same volume of gas. They must have started with the same amounts of reactants.

At which point in the reaction are the concentrations of reactant particles at their highest?

• A

• B

• C

The minimum energy required for a reaction to occur is called the _________ energy

Which piece of apparatus is essential to measure the rate of reaction

• Gas syringe

• Measuring cylinder

• Stopwatch

• Delivery tube

At point B the frequency of successful collisions are decreasing because...

• there are less particles with the minimum energy required to react

• there are more particles with the minimum energy required to react

• there are less particles colliding per second

• there are more particles colliding per second