Solubility Practice Problems

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Presentation transcript:

Solubility Practice Problems Practice answering the questions about the solubility graph.

Question #1 At 30°C approximately 10g of KClO3 will dissolve in 100g of water. If the temperature is increased to 80°C, approximately ______ of the substance will dissolve in 100g (or 100mL) of water.

Question #1 At 30°C approximately 10g of KClO3 will dissolve in 100g of water. If the temperature is increased to 80°C, approximately ______ of the substance will dissolve in 100g (or 100mL) of water.

Question #1 At 30°C approximately 10g of KClO3 will dissolve in 100g of water. If the temperature is increased to 80°C, approximately ______ of the substance will dissolve in 100g (or 100mL) of water.

Question #2 Directions: Use the graph to answer the following questions. REMEMBER UNITS! What mass of solute will dissolve in 100mL of water at the following temperatures? A. KNO3 at 70°C = ____________ B. NaCl at 100°C= ____________ C. NH4Cl at 90°C= ____________ D. Which of the above three substances is most soluble in water at 15°C. = ____________

Question # 3 Types of Solutions A. On a solubility curve, the lines indicate the concentration of a __________________ solution - the maximum amount of solute that will dissolve at that specific temperature. B. Values on the graph ____________ a curve represent unsaturated solutions - more solute could be dissolved at that temperature.

Question #4 Label the following solutions as saturated or unsaturated. If unsaturated, write how much more solute can be dissolved in the solution. A. a solution that contains 70g of NaNO3 at 30°C (in 100 mL H2O) B. a solution that contains 50g of NH4Cl at 50°C (in 100 mL H2O) C. a solution that contains 20g of KClO3 at 50°C (in 100 mL H2O) D. a solution that contains 70g of KI at 0°C (in 100 mL H2O)

Question #5 a. What is the solubility of KCl at 5C? What is the solubility of Ce2(SO4)3 at 10C? d. What is the solubility of Ce2(SO4)3 at 50C?

Question #6 a. At 90C, you dissolved 10 g of KCl in 100. g of water. Is this solution saturated or unsaturated? b. How do you know?

Question #7 A mass of 100 g of NaNO3 is dissolved in 100 g of water at 80ºC. Is the solution saturated or unsaturated?

Question #8 A mass of 80 g of KNO3 is dissolved in 100 g of water at 50 0C. The solution is heated to 700 How many more grams of potassium nitrate must be added to make the solution saturated? B. Explain your reasoning?