Hydrogen peroxide solution is used to bleach hair. It slowly breaks down to form water and oxygen. A small amount of manganese(IV) oxide makes the hydrogen peroxide break down much faster.
Complete the word equation for the breakdown of hydrogen peroxide.
hydrogen peroxide →\rightarrow→ ........ + ........
Manganese(IV) oxide is a catalyst. State what is meant by a catalyst.
Describe the test for oxygen gas.
State how the mass of manganese(IV) oxide at the end of the reaction compares with its mass at the start.
Living cells contain biological catalysts.
Give the name of biological catalysts.
Give one use of biological catalysts in making a product.
122 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.