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 shows that 60 g of a salt dissolves in 100 g of water at 70°C. If a solution at 70°C contains 80 g of the salt in 100 g of water, what will likely happen if the solution is disturbed?
A solubility curve shows that at 50°C, 90 g of a salt can dissolve in 100 g of water. If a solution at 50°C contains 90 g of the salt in 100 g of water, what is the solution's status?
A solubility curve shows that the solubility of a salt at 30°C is 50 g per 100 g water. If 60 g of the salt is added to 100 g of water at 30°C and all dissolves, what type of solution is this?
A solution contains 30 g of NaNO3 in 100 g of water at 20°C. The solubility of NaNO3 at 20°C is 85 g per 100 g water. Is the solution saturated, unsaturated, or supersaturated?
A student prepares a solution by dissolving 80 g of KNO3 in 100 g of water at 60°C. According to the solubility curve, the maximum solubility at 60°C is 110 g per 100 g water. Is the solution saturated, unsaturated, or supersaturated?
Describe the difference between a saturated and a supersaturated solution using the concept of solubility curves.
Describe what happens to a saturated solution if the temperature is decreased.
Explain how you would use a solubility curve to determine if a solution is saturated, unsaturated, or supersaturated.
Explain why a solution becomes supersaturated when cooled slowly after dissolving excess solute at a higher temperature.
If 40 g of KNO3 can dissolve in 100 g of water at 30°C, what type of solution is formed if 50 g of KNO3 is added to 100 g of water at the same temperature?
If a solubility curve for a gas slopes downward, what does this indicate about the solubility of the gas as temperature increases?
If the solubility of a salt is 25 g per 100 g water at 40°C and 40 g per 100 g water at 60°C, how much more salt can be dissolved if the temperature is increased from 40°C to 60°C?
If the solubility of a salt is 80 g per 100 g water at 80°C, how much salt will dissolve in 250 g of water at the same temperature?
On a solubility curve, what does a point lying exactly on the curve indicate about the solution?
The solubility of NaCl at 20°C is 36 g per 100 g of water. If 40 g of NaCl is added to 100 g of water at 20°C, how much will remain undissolved?
What does a solubility curve represent?
What information can you obtain from a solubility curve? Name at least two.
A solubility curve for salt X shows that its solubility at 40℃ is 70 g per 100 g water, and at 80℃ is 120 g per 100 g water. If a saturated solution at 80℃ is cooled to 40℃ without any solute precipitating out, what type of solution is formed at 40℃?
A student adds 100 g of a salt to 200 g of water at 60℃. The solubility curve shows the salt's solubility at 60℃ is 40 g per 100 g water. After stirring, some solid remains undissolved. Calculate the mass of salt that will remain undissolved.
Describe how you would use a solubility curve to determine the minimum temperature required to dissolve 75 g of a solute in 100 g of water.
