There a  a number of key issues that some students have with the Arrhenius expression.

Taking logarithms and converting logarithms to numbers 

Although some students will have encountered logarithms it may be necessary to allow them to practise converting numbers to logarithms and vice versa.

Accutarely plotting the appropriate graph.

Again this is an area of skill which may need to be rehearsed but will yeild useful information if pupils are able to manipulate the data competently

1/t or 1/T

It is worth noting that we have refered previosuly to 1/t being the rate of the reaction where t represents time. In the Arrhenius expresssion we have 1/T which is the inverse of the temperature in degrees K. Some students can get these confused.

Knowing what is meant by a rate constant

This is particularly tricky and depends on when the concept of the rate constant and its determination is introduced.  However it is possible for students to see that the rate constant does reflect the rate and tell them that if concentration of all reactants is 1 mol dm^-3 then the rate constant will be the same as the actual rate.

If you are unfamiliar with what the difference between rate and the rate constant it may be helpful to look at later sections of this module before re-visiting this page.