Question

how do you increase the rate of dissolving ?

Answer 1

To increase the rate of dissolving you can stir the concentration, heat the mixture, or grind the solute.

Answer 2

Nothing in life is to be feared, It is only to be understood. Increasing the temperature, grinding the solute, Or increasing the rate of stirring, Or all three will increase the rate of dissolving of the solute. 

Hope I helped out!