Investigate the rate of decomposition of H2O2 with different amounts of catalyst (MnO2).

Authors Avatar

Ponmuhil Ravichandran

IB Chemistry Lab

To plan and carry out an investigation into the decomposition of Hydrogen Peroxide, H2O2

Lab group: Ponmuhil Ravichandran, Bharath Sundar.

Aim: To investigate the rate of decomposition of  H2O2 with different amounts of

         catalyst (MnO2).

 

Hypothesis: When H2O2 and a catalyst are mixed together, the catalyst would break down H2O2 into water and oxygen. This will result in bubbles being produced. With the data of these oxygen bubbles, the rate at which H2O2 decomposed could be found out.

2H2O2 (l) → 2H2O + O2

The control would be to maintain the same temperature (room temperature) and to use the same amount of hydrogen peroxide (10ml) in all the tubes.

The variable is the use of different amount of catalyst in different test tubes.

Equipment: 10% v/v solution of H2O2

                Catalyst – MnO2

                 5 test tubes

                Stopwatch

                Beaker with distilled water

                Glass tube

                5 single-holed rubber stoppers

Join now!

Procedure:

  1. Fill all 5 test tubes with 10 ml of  H2O2
  2. Measure 0.01g of MnO2 using a filter paper and pour this into the first test tube. Immediately close the test tube with the single-holed rubber stopper in which one end of a glass tube must be inserted. The other end of the glass tube must lead to a beaker with distilled water.
  3. We can see oxygen bubbles being let through the glass tube into the beaker. This shows the decomposition of H2O2. Start the stopwatch and also start counting the ...

This is a preview of the whole essay