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N ame: Solubility Homework W orksheet Use the solubility graph below to answer the following questions: 1. How many grams of KCl can be dissolved in 100 grams of water at 70˚C? 2. How many grams of KNO3 can be dissolved in 100 grams of water at 50˚C? 3. What temperature is required to dissolve 130 grams of KNO3 in 100 grams of water? 4. How many grams of NaCl can be dissolved in 100 grams of water at 100˚C? 5. A solution containing 60 grams of KNO3 dissolved in 100 grams of water at 80˚C would be considered unsaturated, saturated, or supersaturated? Explain your answer: 6. A solution containing 30 grams of KCl dissolved in 100 grams of water at 10˚C would be considered unsaturated, saturated, or supersaturated? Explain your answer: 7. A solution that contains 60 grams of NH4Cl dissolved in 100 grams of water at 30˚C would be considered unsaturated, saturated, or supersaturated? Explain your answer: Cont. on back side… 8. You dissolve 10 g KClO3 in 100 g water at 40oC. Is this solution unsaturated, saturated, or supersaturated? How much more KClO3 must be added to form a saturated solution at 40oC? 9. What is the minimum mass of water needed to dissolve 10 g KClO3 at 40oC? Show your work: 10. A supersaturated solution of KNO3 is formed by adding 90 g KNO3 to 100 g water at 25oC, heating until the solute completely dissolves, and then cooling the solution to 45oC. If the solution is agitated, how much KNO3 will precipitate? 11. How much 45oC water would have to be added (to the original 100 g water in problem #10) to just dissolve all the KNO3 that precipitated? Show your work: 12. How much NaNO3 will dissolve in 145 g water at 30 oC? Show your work: