Back to the full dot-point answer
EnglandChemistryQuick questions
C2: Chemical Change (C2.3 Rates of reaction)
Quick questions on Rates of Reaction (C2.3) - Eduqas A-Level Chemistry
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is concentration and pressure?Show answer
Higher concentration (in solution) or higher pressure (for gases) packs the particles closer, so they collide more often and the rate rises. Surface area. Breaking a solid into smaller pieces exposes more particles to collision, so a powder reacts faster than a lump. Temperature and catalysts are best explained with the energy distribution, below.
What are catalyst lowers the energy of reactants?Show answer
A catalyst lowers the activation energy by offering a new route; it does not lower the energy of the reactants or change .
What is q1?Show answer
State the two conditions that must be met for a collision between particles to be successful. [2 marks]
What is q2?Show answer
Explain why increasing the surface area of a solid reactant increases the rate of reaction. [2 marks]
Have a question we have not covered?
This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.