My new course for AQA A-level Chemistry will be launching soon. Add your name to the waiting list and I'll let you know when it's released (and I'll give you a discount code😊)
A-level Chemistry: The hard bits (year 2) will cover exactly that - the hard bits of the specification that often get missed at school and students really struggle with.
I'll include the Arrhenius equation, Gibbs free energy graphs, acid base and buffer calculations and and everything else I think you need to know to take you beyond the basics and aim for an A or A*.