What is a catalyst, and how does it affect the rate of reaction?
A catalyst is a substance which provides an alternative pathway requiring a lower activation energy for the chemicals to react, and speeds up the rate of reaction. A catalyst also remains chemically unchanged at the end of the reaction.
JE
Related Chemistry GCSE answers
All answers ▸For the reaction, 2SO2(g) + O2(g) => 2SO3(g), suggest the optimal conditions to maximise yield of SO3 when the forward reaction is exothermic.
Explain why chloride and bromide are in the same group in the period table. Also describe the electronic structures of both.
Explain what oxidation and reduction means in terms of electrons.
Potassium forms an ionic compound with sulfur. Describe what happens when two atoms of potassium react with one atom of sulfur. Give your answer in terms of electron transfer.