Explain in terms of particles and collisions how concentration, temperature and addition of a catalyst affect the rate of a reaction.

Concentration: the higher the concentration, the more particles in the same volume. The increase in particle numbers causes an increase in particle collisions, so the rate of reaction increases.Temperature: at higher temperatures the rate of reaction increases. This is because the particles have more energy, so move around faster. This increases the chance of particle collisions so increases the rate of reaction.Addition of a catalyst: catalysts provide a different route for the reaction which has a lower activation energy. This means that more of the particle collisions will be effective so the rate of reaction increases.

EW
Answered by Emily W. Chemistry tutor

10148 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

How would you carry out a flame test and what colours would Li+, Na+, K+ and Ca2+ ions form?


What is the difference between an exothermic and endothermic reaction?


CO(g) + 2H2(g) ⇌ CH3OH(g). A pressure of 100 atmospheres is used instead of atmospheric pressure. The higher pressure gives a greater yield of methanol and an increased rate of reaction. Explain why.


Why is chlorine more reactive than iodine?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences