Question

4. The decomposition of hydrogen peroxide, H2O2, produces water and oxygen gas. a. Write a balanced equation for this decomposition reaction. b. The reaction is faster with the addition of potassium iodide, KI. Should this chemical appear in the balanced reaction? What is its purpose? 5. If you were running a reaction at 25°C and increased the temperature 30°C to 55°C. How much faster should the reaction at the higher temperature be?

Answer 1

4.

a)

Balanced decomposition reaction is

2 H₂O₂ (l)   $\to$ 2 H₂O (l) + O_{2 (g)}

b)

No KI should not be appear in the balanced reaction, as KI is not consumed in the reaction.

KI is catalyst it increases the rate of decomposition reaction.