Page 2 Name: Using Figure 13.4, answer the question 6-8 6. You have a solution o
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Question
Page 2 Name: Using Figure 13.4, answer the question 6-8 6. You have a solution of KCI containing 50 g KCI in 100 g H,O at 30°C. Is the solution saturated or unsaturated? If saturated, how much solute remains undissolved? 7. You have a solution of KCIO, containing 20 g KCIO, in 100 g H O at 70°C. Is the solution saturated or unsaturated? If saturated, how much solute remains undissolved? 8. Suppose you have a solution of NaCl containing S0 g KNO, dissolved in 125 g H:0 at 100°C. Will the solution be saturated or unsaturated? If saturated, how much solute remains undissolved? 9. (a) What is the mass of KCl in 197 g of a solution containing 1.08% KCI by mass. (b) What is the molarity of the KCI solution in 9%a) given the density of the KCl solution is 1.98 g/ml.Explanation / Answer
Q6
at 30°C
solubility of KCl --> 35 g of Kcl per 100 g of water
then
50 g > 35 g
meaning that this must be saturated and it has about 50-35 = 15 g of solid salt undissolved
Q7
S = 30 g of KClO3 / 100 g
then
20 g is below the 30 g, meaning that this is unsaturated, there is no solid salt present
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