GCSE AQA Triple Chemistry Paper 1 2024/2025 QUESTIONS AND CORRECT ANSWERS ALREADY PASSED

C8 1) What is required for a reaction to happen? - answer a successful collisions C8 2) How can you use a graph to calculate the rate of reaction? - answer calculate gradient (on a curve tangent) C8 3) What four things can speed up the rate of reaction? - answer temperature, concentration, surface area and catalyst C8 11) What formula is used to calculate the rate of reaction? - answer amount of product used or amount of product formed / time C8 12) What would a line with negative gradient look like? - answer line would go down C8 4) What 3 methods can be used to find out the rate of reaction? - answer measure colour change / measure volume of gas produced / measure change in mass C8 4) How can you increase the rate of reaction? - answer increase collisions / increase energy C8 8) How does increasing surface area increase the rate of reaction? - answer larger surface area quicker reaction rate C8 14) Why is the rate of reaction increased if you crush up solids? - answer larger surface area quicker reaction rate C8 13) What is the minimum amount of energy that particles must have before they react call? - answer activation energy C8 15) How do you increase the surface area of a solid? - answer crush it C8 5) Put these in order of larger surface area - small , medium and large marble chips - answer small C8 5) How does temperature increase the rate of reaction? - answer more energy / move quicker / collide more frequently - more successful collisions C8 6) When increasing the temperature, at the end of the reaction why is no more product made? - a