Question

to make a solution for an experiment, gunther needs to add 40 g of a solute to 100 g of water. when making the solution at room temperature, he could only add 34 grams before the solute settled out. what could he do to dissolve the remaining 6 grams of the solute? put the solution in an ice bath, dissolve the solute, and let the solution return to room temperature. heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out. add more water, boil the solution, and dissolve the solute until the some of the water evaporates. keep the solution at room temperature, add more water, and dissolve the excess solute.

Explanation:

The solubility of most solids in water increases with temperature. Heating the solution will increase the solubility of the solute, allowing the remaining 6 grams to dissolve. Cooling the solution slowly after dissolving ensures that the solute remains dissolved and nothing settles out. Adding more water and boiling is not the best option as it changes the concentration and may be unnecessary. Keeping the solution at room - temperature and adding more water changes the concentration and is not the most efficient way. Cooling the solution in an ice - bath will decrease the solubility further.

Answer:

Heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.