This memory aid covers Memory Aid: CEO within Rates & Collision Theory for GCSE Chemistry. Revise Rates & Collision Theory in Rates of Reaction for GCSE Chemistry with 25 exam-style questions and 16 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 10 of 14 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
🧠 Memory Aid: CEO
To remember the conditions for a successful collision, think of the letters CEO:
- C — COLLIDE (particles must physically meet)
- E — ENERGY ≥ Ea (must exceed activation energy)
- O — ORIENTATION (must hit at the right angle)
A CEO runs a company — all three must be present for the company (reaction) to succeed. If any one is missing, nothing happens!
Practice questions for Rates & Collision Theory
According to collision theory, which of the following must happen for a chemical reaction to take place?
Explain, using collision theory, why increasing the concentration of a reactant solution increases the rate of reaction.