AQA and OCR A · Year 13 physical chemistry
Rate equation question generator
Generate fresh initial-rates tables, determine individual reaction orders, write the rate equation, and calculate the rate constant with the correct units.
Initial Rates Laboratory
Build the rate equation from experimental data
Every table is generated from a hidden, internally consistent rate law. Harder modes require linked comparisons rather than one convenient pair per reactant.
What this A-level rate equation generator practises
Use ratios between experiments to determine the power of each concentration term. A zero-order reactant does not affect the rate, a first-order reactant changes the rate by the same factor as its concentration, and a second-order reactant changes the rate by the square of that factor.
The challenge and master modes deliberately change more than one concentration at once. You must first determine one order, remove its known contribution to the rate change, and then isolate the next reactant. This is closer to the less obliging data tables used in stronger exam questions.
AQA and OCR A coverage
The initial-rates method, rate equations, overall order, rate constants and units are shared by AQA and OCR A. Half-life evidence is kept out of this numerical generator and appears only in the OCR A mode of the Order Detective, because it is not part of the AQA requirement.
Rate Equation Order Detective
Deduce orders from concentration changes, graph descriptions, units of k and OCR-only half-life clues.
Open the detective game → Related calculationArrhenius equation practice
Calculate activation energy or a rate constant using logarithmic forms of the Arrhenius equation.
Practise Arrhenius → Visual modelBoltzmann distribution
Explore how temperature and catalysts change the fraction of particles able to react.
Open the simulator →