Every year exam boards intentionally put some questions that separate A scoring students from A*. Our team at brightmindtutors have combed through years of examiner reports to find the hardest A level chemistry questions which were lowest scoring and conceptually complex ever set. Our tutors have also expanded the solutions using simple steps for you.
ARE YOU A*READY? PUT YOUR SKILLS TO TEST
Exam Tip (AQA A Level Chemistry)
Always convert the ion’s mass into relative molecular mass (Mr) as the final step
Remember that ions are accelerated by an electric field, so the electrical potential energy gained is equal to the kinetic energy gained. This relationship is the key to solving mass spectrometry calculation questions involving ion velocity, mass, and Mr
Top Mark Tip:
For AQA buffer questions, do not use the initial acid concentration directly. First account for the neutralisation reaction, then use the equilibrium concentrations of the weak acid and conjugate base in the Ka expression.
This mirrors the AQA marking approach: reaction → mole changes → Ka expression → pH calculation, which helps students secure all available marks
Top AQA Exam Strategy
Before writing a single calculation, ask yourself:
✔ What species is this titration measuring?
✔ Does it measure the whole mixture or just one component?
AQA rewards method marks.
In AQA redox titrations, the balanced ionic equation is your roadmap—get it right first, and the rest of the calculation becomes much easier.
