Question

Match the factors which affect the rate of dissolving/dissociation. 1. increased surface area . 2. like polarity increases rate . 3. temperature 4. stirring . A)rate proportional to K.E.. B)concentration decreases around solute. C)finely divided solute. D)matching solvent and solute

Answer 1

Answer :

            Part A                                                   Part B

1) increased surface area          →      C) finely divided solute

2) like polarity increases rate   →       D)matching solvent and solute

3) temperature                           →       A)rate proportional to K.E

4) stirring                                    →       B)concentration decreases around solute

Explanation :

1) Greater the surface area, the faster the substance will dissolve. When we are finely divided the solute then the surface area increased.

2) A polar molecule will dissolve in other polar molecules, but it will not dissolve in non-polar molecules.

3) Temperature is directly proportional to the kinetic energy. As the temperature increases, the kinetic energy also increases.

4) Stirring a solute into a solvent, the dissolving rate increases and the concentration decreases around the solute.

Answer 2

The correct matches are as follows:

1. increased surface area
 C)finely divided solute.

2. like polarity increases rate
 D)matching solvent and solute

3. temperature
A)rate proportional to K.E.

4. stirring
B)concentration decreases around solute.