Statement& Hypothesis:
Observe hydrogen peroxide add catalyst reaction
Materials:
Hydrogen peroxide solution、manganese dioxide and pig liver.
Experiments 1
Procedure:
1. Measure 25ml H2O2 and pour it into the beaker.
2. Pour soap-suds into the beaker that has solution..
3. Finally, stir manganese dioxide in beaker.
Data& observations:
I saw the H2O2 has very strong reactions, than it makes many bubbles.
Analysis:
It could make bubbles, because the solutions resolve the gas.
H2O2+MnO2------H2O+O2+MnO2
Conclusion:
So, the MnO2 is a kind of catalyst. It can make reaction quickly, but it doesn’t make reaction with hydrogen peroxide solution.
Experiments 2
Procedure:
1. Measure 25ml H2O2 and pour it into the beaker.
2. Then, put pig liver that has cut up.
Data& observations:
I also saw they makes many bubbles, and they didn’t need pour soap-suds.
Analysis:
According to data shows, there has a kind of enzyme in the pig liver. It can make H2O2 to resolve hydrogen.
Conclusion:
Catalyst is a kind of can change the chemical reaction rate, but does not participate in the reaction
