Why does reducing solute particle size increase the speed at which the solute dissolves in water?

A. It makes the temperature of the water significantly higher.

B. It exposes morg of the solute to the water molecules.

C. It makes the water molecules move around faster.

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D. It raises the pressure of the water molecules on the solute.

B. It exposes more of the solute to the water molecules.

Explanation:

Rate of a reaction is dependent on following factors:

a) adding a catalyst: Adding a catalyst increases the rate of reaction

b) reducing the surface area: The rate of the reaction will decrease by reducing the surface area

c) raising the temperature: Increasing the temperature increases the rate of the reaction.

d) increasing the amount of reactants : Increasing the amount of reactants increases the rate of reaction.

If the reactants are present in smaller size, more reactants can react as decreasing the size increases the surface area of the reactants which will enhance the contact of molecules. Hence, more products will form leading to increased rate of reaction.

Thus reducing solute particle size increase the speed at which the solute dissolves in water by exposing more of the solute to the water molecules.

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