Question

* look at the photo *

1. saturated solutions of each of the following compounds are made at 20°c. circle the letter(s) of the solution(s), which will form a precipitate upon heating.
a) nacl b) na2so4 c) li2co3 d) sucrose

2. a saturated solution of potassium chloride is prepared in 100.0 g of water at 20°c. if the solution is heated to
50°c, how much more kcl must be added to obtain a saturated solution?

3. a saturated solution of sucrose in 1000.0 g of boiling water is cooled to 20°c. what mass of rock candy will be formed?

Answer 1

To determine if a solution is unsaturated, saturated, or supersaturated, observe what happens when the solution is heated or cooled. A precipitate forms in a saturated solution upon heating, while no precipitate forms in an unsaturated solution.

Step-by-step explanation:

Saturated solutions are solutions that contain the maximum amount of solute that can dissolve at a given temperature. Supersaturated solutions contain more solute than can normally dissolve at a given temperature.

To determine if a solution is unsaturated, saturated, or supersaturated, you can observe what happens when the solution is heated or cooled.

If a precipitate forms upon heating, the solution is saturated. If no precipitate forms, the solution is unsaturated. If a precipitate forms upon cooling, the solution is supersaturated.