Nigel Baldwin | Factors affecting the rate of a chemical reaction WNOD4382 @nigelbaldwin3184 | Uploaded May 2022 | Updated October 2024, 11 hours ago.
High School Chemistry

Safety
DO NOT USE 50% hydrogen peroxide, it decomposes very violently and exothermically when mixed with manganese dioxide.
50% hydrogen peroxide should be diluted at least 10X to 5% or less for use in experiments.
Wear safety spectacles, gloves and a lab coat

Factors affecting the rate of a chemical reaction

Topic primer or revision video

What are the four factors that lead to an increased rate of reaction in IGCSE Chemistry courses?

Four reactions in test-tubes

1 Surface area of solid reactants
limestone chips versus powdered calcium carbonate
calcium carbonate and hydrochloric acid

2 Effect of a catalyst
two black powders and hydrogen peroxide
copper II oxide and manganese dioxide

3 Concentration
Magnesium and hydrochloric acid
Dilute acid about 0.1M and concentrated acid 2M

4 Temperature
Hot and cold
Sodium thiosulfate, 0.5ml 0.1M and hydrochloric acid 2ml 2M