Question 1 (2 points) A solubility graph shows the solubility of three substances (A. B, and C) in 100 mL of water at different temperatures. Substance As solubility Increases significantly with temperature while B and C show little change. At60^circ C - A dissolves up to 1009 - 8 dissolves up to 409 - Cdissolves up to 20g If 70 gof Substance A is dissolved in water at 60^circ C and then cooled to 30^circ C, where its solubility is 50 C. which of the following COULD happen to the solution? Column A 1. The solution is supersaturated after cooling 2 The solution is saturated with 20g of solute undissolved after cooling. 3. The solution is unsaturated after cooling 4. A crystal is added to the heated solution and rapid crystallization occurs 5. A crystal is added to the cooled solution and rapid crystallization occurs. 6. The heated solution is saturated 7. __ The heated solution is unsaturated Column B a. Possible b. Not possible

Question

Question 1 (2 points) A solubility graph shows the solubility of three substances (A. B, and C) in 100 mL of water at different temperatures. Substance As solubility Increases significantly with temperature while B and C show little change. At60^circ C - A dissolves up to 1009 - 8 dissolves up to 409 - Cdissolves up to 20g If 70 gof Substance A is dissolved in water at 60^circ C and then cooled to 30^circ C, where its solubility is 50 C. which of the following COULD happen to the solution? Column A 1. The solution is supersaturated after cooling 2 The solution is saturated with 20g of solute undissolved after cooling. 3. The solution is unsaturated after cooling 4. A crystal is added to the heated solution and rapid crystallization occurs 5. A crystal is added to the cooled solution and rapid crystallization occurs. 6. The heated solution is saturated 7. __ The heated solution is unsaturated Column B a. Possible b. Not possible

Answer 1

To determine what could happen to the solution when it is cooled from 60°C to 30°C, we need to consider the solubility of Substance A at each temperature.At 60°C, the solubility of Substance A is 100g. This means that at this temperature, 100g of Substance A can dissolve in 100mL of water.At 30°C, the solubility of Substance A is 50g. This means that at this temperature, only 50g of Substance A can dissolve in 100mL of water.Now let's analyze each statement in Column A:1. The solution is supersaturated after cooling. - This is possible. When the solution is cooled from 60°C to 30°C solubility of Substance A decreases. If the solution initially contained 70g of Substance A, it would be supersaturated at 30°C because only 50g can dissolve at this temperature.2. The solution is saturated with 20g of solute undissolved after cooling. - This is not possible. If the solution initially contained 70g of Substance A, it would be supersaturated at 30°C. The excess solute would crystallize out, but it would not be saturated with 20g of solute undissolved.3. The solution is unsaturated after cooling. - This is not possible. The solution would be supersaturated at 30°C, so it cannot be unsaturated.4. A crystal is added to the heated solution and rapid crystallization occurs. - This is possible. If a crystal of Substance A is added to the supersaturated solution at 30°C, rapid crystallization would occur as the excess solute precipitates out.5. A crystal is added to the cooled solution and rapid crystallization occurs. - This is possible. If a crystal of Substance A is added to the supersaturated solution at 30°C, rapid crystallization would occur as the excess solute precipitates out.6. The heated solution is saturated. - This is possible. At 60°C, the solubility of Substance A is 100g, so the heated solution would be saturated if it contains 70g of Substance A.7. The heated solution is unsaturated. - This is not possible. The heated solution would be saturated if it contains 70g of Substance A at 60°C.Therefore, the correct answers are:1. a. Possible2. b. Not possible3. b. Not possible4. a. Possible5. a. Possible6. a. Possible7. b. Not possible

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