Question

state the factors which affect the speed of a reaction. Describe any two factors with examples
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Answer 1

Explanation:

The factors that affect reaction rates are:

surface area of a solid reactant.

concentration or pressure of a reactant.

temperature.

nature of the reactants.

presence/absence of a catalyst.

Answer 2

Factors which affect the speed of a reaction are addition of catalyst, temperature, nature of reactants, surface area, and concentration.

Explanation:

Factors which affect the speed of a reaction are addition of catalyst, temperature, nature of reactants, surface area, and concentration.

For example, a catalyst helps in increasing the rate of a chemical reaction because a catalyst lowers the activation energy and hence, more number of reactant molecules take part in the chemical reaction. This leads to completion of reaction in less time.

Also, when we increase the temperature of a chemical reaction then molecules gain kinetic energy. As a result, they tend to colloid more rapidly with each other. Hence, rate of reaction also increases.

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