Match the solution to its description using the following diagram:

Question

Column A
1.
20g of NaCl at 50°C:
20g of NaCl at 50°C
2.
45g KCl at 60°C:
45g KCl at 60°C
3.
70g of CaCl2 at 10°C:
70g of CaCl2 at 10°C
Column B
a.saturated
b.supersaturated
c.unsaturated

Answer 1

To match the solutions to their descriptions, let's first understand what each type of solution means:

• Saturated solution: This is a solution in which the maximum amount of solute has been dissolved in a solvent at a given temperature. Any additional solute will not dissolve.

• Supersaturated solution: This is a solution that contains more solute than can normally dissolve at that temperature. It is unstable and can precipitate if disturbed.

• Unsaturated solution: This is a solution in which less solute is dissolved than the maximum amount possible at that temperature. More solute can still be added and will dissolve.

Now, let's analyze each solution in Column A:

1. 20g of NaCl at 50°C: Depending on the solubility of NaCl at 50°C, this solution may be either saturated or unsaturated. Typically, 20g of NaCl is less than the maximum solubility at 50°C.

2. 45g KCl at 60°C: At 60°C, KCl has higher solubility than NaCl, but we need to know if 45g is a maximum or not. Usually, 45g of KCl at this temperature is also considered less than saturation.

3. 70g of CaCl2 at 10°C: Calcium chloride has a high solubility, but 70g at 10°C would likely exceed that solubility for many scenarios. Therefore, this solution is very likely supersaturated.

Based on the properties of solubility of these salts, here is a likely matching:

1. 20g of NaCl at 50°C: c. unsaturated
2. 45g KCl at 60°C: a. saturated
3. 70g of CaCl2 at 10°C: b. supersaturated

So the final matches would be:

1. 20g of NaCl at 50°C – c. unsaturated
2. 45g KCl at 60°C – a. saturated
3. 70g of CaCl2 at 10°C – b. supersaturated