Question

Explain factors affecting rate of chemical reaction ?

Answer 1

Reactions occur when two reactant molecules effectively collide, each having minimum energy and correct orientation. Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.

Answer 2

Answer:

The factors affecting the rate of a reaction are the concentration of reactants, the physical state of the reactant, surface area, temperature and catalyst.

Explanation:

The rate of a reaction between two substances depends upon the rate of collisions and also the rate of the encounter between the molecules.

Some of the important factors which affect the rate of reaction are.

• Concentration of reactants: As the reaction proceeds, the concentration of the reactants decreases while those of the product decrease. The rate increases with concentration.
• Physical rate of reactants: The reaction will proceed faster if the reactants are mixed in the liquid or in the gaseous phase.
• Surface area and particle size of reactants: The rate of a reaction involving a solid reactant increases as the surface area because the area of the substance is more.
• Temperature: the speed of a reaction increases with a rise in temperature. the speed becomes doubled for each 10° rise in temperature.
• Catalyst: A catalyst may be a substance that alters the speed of a reaction without getting used up within the reaction.

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