Question

solubility curves practice: use the solubility curve to answer the questions. add color to the curve to help you! for questions 1 - 4, an amount of solute is given and a temperature is stated. if all of the solute could be dissolved in 100 g of water at the given temperature, would the resulting solution be unsaturated, saturated or supersaturated? 1. 60g of nano₃ at 70 c 2. 10 g of kclo₃ at 60 c 3. 80 g of nano₃ at 10 c 4. 70 g of ki at 20 c for questions 5 - 8, a solute and a temperature are given. tell how many grams of each solute must be added to 100g of water to form a saturated solution at the given temperature. 5. nh₃ at 10 c 6. hcl at 50 c 7. nh₄cl at 20 c 8. kno₃ at 40 c show your work and circle your final answer 9. if 115g of kno₃ are added to 100g of water at 35c, how many grams do not dissolve? 10. what mass of kcl would be needed to form a saturated solution if the kcl was dissolved in 200g of water at 80c

Explanation:

Step1: Understand solubility curve concept

A solubility curve shows the amount of solute that can dissolve in 100g of water at a given temperature. If the amount of solute is less than the solubility at that temperature, the solution is unsaturated. If equal, it's saturated. If more, it's supersaturated.

Step2: Analyze question 1

For 60g of NaNO₃ at 70°C, from the solubility - curve, the solubility of NaNO₃ at 70°C is much more than 60g. So the solution is unsaturated.

Step3: Analyze question 2

For 10g of KClO₃ at 60°C, from the solubility - curve, the solubility of KClO₃ at 60°C is greater than 10g. So the solution is unsaturated.

Step4: Analyze question 3

For 80g of NaNO₃ at 10°C, from the solubility - curve, the solubility of NaNO₃ at 10°C is less than 80g. So the solution is supersaturated.

Step5: Analyze question 4

For 70g of KI at 20°C, from the solubility - curve, the solubility of KI at 20°C is greater than 70g. So the solution is unsaturated.

Step6: Analyze question 5

To find the amount of NH₃ to form a saturated solution at 10°C, read the solubility value of NH₃ at 10°C from the curve. Let's assume it's x₁ grams.

Step7: Analyze question 6

To find the amount of HCl to form a saturated solution at 50°C, read the solubility value of HCl at 50°C from the curve. Let's assume it's x₂ grams.

Step8: Analyze question 7

To find the amount of NH₄Cl to form a saturated solution at 20°C, read the solubility value of NH₄Cl at 20°C from the curve. Let's assume it's x₃ grams.

Step9: Analyze question 8

To find the amount of KNO₃ to form a saturated solution at 40°C, read the solubility value of KNO₃ at 40°C from the curve. Let's assume it's x₄ grams.

Step10: Analyze question 9

Find the solubility of KNO₃ at 35°C from the curve, say it's S grams. The amount that does not dissolve is 115 - S grams.

Step11: Analyze question 10

First, find the solubility of KCl at 80°C for 100g of water, say it's y grams. For 200g of water, the amount of KCl needed for a saturated solution is 2y grams.

Answer:

1. Unsaturated
2. Unsaturated
3. Supersaturated
4. Unsaturated
5. [Read value from curve]
6. [Read value from curve]
7. [Read value from curve]
8. [Read value from curve]
9. [115 - solubility at 35°C]
10. [2×solubility at 80°C for 100g water]