Solubility and Temperature Relationships

The video tutorial explains how to interpret solubility curves, focusing on the axes representing temperature and grams. It covers reading graphs with multiple solutes, calculating solubility at various temperatures, and identifying the most and least soluble substances. The tutorial also discusses saturation levels, including supersaturation and unsaturation, and how to determine precipitation and line changes on solubility graphs.

What does the x-axis represent on a solubility curve?

• Volume of solvent

• Temperature

• Amount in grams

• Type of solute

How many grams of calcium chloride can be dissolved at 20°C?

• 25 grams

• 100 grams

• 75 grams

• 50 grams

At what temperature can 40 grams of potassium chloride be dissolved?

• 50°C

• 35°C

• 42°C

• 30°C

Which substance is most soluble at 90°C?

• Potassium chloride

• Calcium chloride

• Sodium chloride

• Potassium dichromate

Which substance is least soluble at 10°C?

• Potassium chlorate

• Sodium chloride

• Potassium dichromate

• Calcium chloride

What does it mean if a solution is supersaturated?

• The dot is above the line

• The dot is not on the graph

• The dot is below the line

• The dot is on the line

If a solution is unsaturated, where would the dot be on the graph?

• Not on the graph

• Below the line

• Above the line

• On the line

How many grams of calcium chloride would precipitate when cooling from 25°C to 15°C?

• 10 grams

• 15 grams

• 20 grams

• 5 grams

Which salt shows the least amount of change in solubility with temperature?

• Calcium chloride

• Sodium chloride

• Potassium dichromate

• Potassium nitrate

Which salt shows the most drastic change in solubility with temperature?

• Sodium chloride

• Calcium chloride

• Potassium dichromate

• Potassium nitrate