Chemistry Topic Practice

GCSE Chemistry Rates of Reaction Factors

The rate of a chemical reaction is how fast reactants are turned into products. This can be affected by temperature, concentration, surface area, and catalysts.

Why does increasing temperature increase the rate of reaction?

What is Rates of Reaction Factors?

"Rate of reaction is the speed at which chemical products are formed from reactants, governed by the frequency and energy of particle collisions."

Question 1

Increasing the concentration of reactants increases the rate because particles...

Question 2

Why does a powder react faster than a single large lump of the same mass?

Question 3

How does a catalyst increase the rate of reaction?

Collision Theory Essentials

Reactions occur when particles collide with sufficient energy (activation energy).

Higher temperature makes particles move faster and collide with more energy.

Higher concentration/pressure increases the frequency of collisions.

Surface area increases the area available for collisions.

Exam Tip

A catalyst increases the rate of reaction by providing an alternative pathway with a lower activation energy.

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