7. You have 200 g of potassium nitrate in 200 g of water at 80°C. The solution is cooled to 30°C. What mass of potassium nitrate precipitates out as a solid in the 30°C solution? Solubility (mass in g of solute) per 100.0 g of water 200 175 150 125 100 75 NaNO3 50 25 0 KNO 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C) (A) 175 g (B) 150 g (C) 25 g (D) 75 g

7. You have 200 g of potassium nitrate in 200 g of water at 80°C. The solution is cooled to 30°C. What mass of potassium nitrate precipitates out as a solid in the 30°C solution? Solubility (mass in g of solute) per 100.0 g of water 200 175 150 125 100 75 NaNO3 50 25 0 KNO 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C) (A) 175 g (B) 150 g (C) 25 g (D) 75 g

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 148QRT

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7. You have 200 g of potassium nitrate in 200 g of
water at 80°C. The solution is cooled to 30°C. What
mass of potassium nitrate precipitates out as a
solid in the 30°C solution?
Solubility (mass in g of solute)
per 100.0 g of water
200
175
150
125
100
75
NaNO3
50
25
0
KNO
0 10 20 30 40 50 60 70 80 90 100
Temperature (°C)
(A) 175 g (B) 150 g
(C) 25 g
(D) 75 g

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