Question

When a cube of manganese oxide was added to a solution of hydrogen peroxide, water and oxygen were produced. Manganese oxide was not used up in the
reaction. Which of the following is likely to increase the rate of the reaction?
Reducing the mass of the cube
Using a smaller amount of solution
Smashing the cube into pieces
Chilling the hydrogen peroxide solution

Answer 1

Answer:

chilling the hydrogen peroxide solution

Explanation:

everyone says the rest of the answers are wrong

Answer 2

Smashing the cube into pieces

Explanation:

Smashing the cube into pieces will most likely increase the reaction rate between the manganese oxide and hydrogen peroxide.

The rate of a chemical reaction is a measure of the speed of a chemical reaction.

Some factors that affects the rate of chemical reaction are:

1. Nature of the reactants
2. Concentration of the reactants or pressure if gases.
3. Temperature
4. Presence of a catalyst.
5. Sunlight(some reactions are light catalyzed)

• The nature of reactants implies the physical state of matter, bond type or surface area exposed of reacting species.
• The surface area exposed is directly proportional to the reaction rate.
• Breaking the cubes into smaller pieces exposes more surface area to the chemical action and the reaction rate increases.

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