Study carefully the reaction represented by the equation below. 2H2O 2(l) → O 2(g) + 2H2O(l). Which of the following will not reaction increase the reaction rate?

  • A Heating the hydrogen peroxide
  • B Adding a pinch of MnO2 to the reactant
  • C increasing the concentration of the H2O2
  • D Adding water to the reactant
  • E Exposing the reactant to sunlight
waec 1992chemistry

The correct answer is D. Adding water to the reactant

Reaction of decomposition of hydrogen peroxide is very slow in moderate temperatures without the presence of a catalyst.

It can be sped up by increasing the temperature, which triggers the reaction of thermal decomposition.

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