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100 90 80 NaNO 1. Using the Solubility Curve, label on the graph a point that would represent the following solutions at 60. °C: a. A supersaturated solution for potassium chloride. (1 mark) b. A unsaturated solution for lead(II) nitrate. (1 mark) c. A saturated solution for K2Cr2O7. (1 mark) 70 K,Cro 60 Solubility (g of salt in 100 g H,0) 50 Pb(NO3)2 KROS КСИ 40 NaCl 30 20 KCIO, 10 CeSO) Figure 1: Solubility of ionic compounds at different temperatures 0 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C)
2. A solution of potassium chlorate contains 40. g/ 100 g H20 at 83 °C. Show your work to determine the mass of the solute that will precipitate from the solution when cooled to 30 °C. (2 marks)
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