6.1 Chemical Kinetics

State three ways of monitoring concentration changes in a reaction.

[3]

A reaction is monitored by measuring the volume of a gas produced every 10 seconds. State an appropriate unit to use.

[1]

Sketch a graph to show the volume of gas produced during the course of an experiment against the time taken.

[4]

State the effect that increasing concentration has on the rate of a reaction.

State the effect that increasing temperature has on the rate of a reaction.

Sketch a line on the graph to show the same reaction occurring at a higher temperature.

[3]

State two variables that need to be controlled when investigating the effect of temperature on rate in the following reaction:

2HCl (aq) + Mg (s) MgCl₂ (aq) + H₂ (g)

[2]

Suggest an appropriate piece of equipment to use to measure the volume of H₂ gas produced in the reaction between HCl and Mg.

[1]

Sketch a line on the potential energy profile diagram to show the pathway for the same reaction, but with a catalyst.

[2]

Explain how catalysts work.

[3]

A Maxwell-Boltzmann distribution is shown below:

Draw a line on the Maxwell-Boltzmann curve below to show the effect of adding a catalyst.

[1]

Shade in the area representing the number of particles that can react with the catalyst present.

[1]

Sketch a line on the graph to show the same reaction occurring with a catalyst.

[3]