Solubility Curves and Their Interpretation
Chemistry ⇒ Solutions and Colloids
Solubility Curves and Their Interpretation starts at 10 and continues till grade 12.
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A solubility curve for a salt shows that at 60°C, 80 g of the salt can dissolve in 100 g of water. If you add 100 g of the salt to 100 g of water at 60°C, how much will remain undissolved?
A solubility curve shows that at 10°C, 30 g of a salt can dissolve in 100 g water. If you have a solution with 35 g of the salt in 100 g water at 10°C, what type of solution is this?
A solubility curve shows that at 25°C, 36 g of NaCl can dissolve in 100 g water. If you add 40 g NaCl to 100 g water at 25°C, how much will remain undissolved?
A solution at 25°C contains 50 g of sugar in 100 g water. The solubility of sugar at 25°C is 200 g per 100 g water. Is the solution saturated, unsaturated, or supersaturated?
A solution at 40°C contains 30 g of solute per 100 g water. The solubility at 40°C is 25 g per 100 g water. What will happen if the solution is left undisturbed?
A solution contains 15 g of solute in 100 g water at 20°C. The solubility at 20°C is 20 g per 100 g water. Is the solution saturated, unsaturated, or supersaturated?
A student dissolves 40 g of KNO3 in 100 g of water at 30°C. According to the solubility curve, the maximum solubility at 30°C is 48 g per 100 g water. Is the solution saturated, unsaturated, or supersaturated?
At 40°C, the solubility of substance Y is 20 g per 100 g water. If you have a solution with 25 g of Y in 100 g water at 40°C, what will happen if you add a seed crystal?
At 50°C, the solubility of substance X is 60 g per 100 g water. If 70 g of X is added to 100 g water at 50°C, what type of solution is formed?
At 70°C, the solubility of KCl is 50 g per 100 g water. If you cool a saturated solution from 70°C to 30°C (where solubility is 35 g per 100 g water), how much KCl will crystallize out?
Describe how you would prepare a supersaturated solution in the laboratory.
Describe how you would use a solubility curve to determine if a solution is saturated, unsaturated, or supersaturated.
Explain how you can use a solubility curve to predict whether a precipitate will form when a solution is cooled.
Explain what happens when a saturated solution is cooled slowly.
Explain why a supersaturated solution is unstable.
Explain why the solubility of gases in water decreases as temperature increases.
If 100 g of water at 80°C can dissolve 60 g of salt, what is the concentration of the saturated solution in g/100 g water?
If a solubility curve for a gas slopes downward as temperature increases, what does this indicate?
If a solubility curve for a salt is a straight horizontal line, what does this indicate about the salt's solubility with temperature?
If the solubility of a salt is 40 g per 100 g water at 60°C, how much salt will dissolve in 250 g of water at the same temperature?
