To increase the solubility of a solute, you can consider the following options:
b. heating the solution - For many solids, increasing the temperature increases solubility. However, this is not true for all solutes.
c. stirring the solution - Stirring helps to distribute the solute throughout the solvent, which can promote dissolving.
d. increasing the surface area of the solute - Increasing the surface area (e.g., by grinding solids into a powder) increases the rate of dissolution and can help the solute to dissolve more quickly.
So, the correct options that can increase the solubility of a solute are:
b, c, d.