Solubility and Temperature Relationships

The video tutorial covers solubility curves, focusing on identifying the least soluble salts at various temperatures, calculating solubility in different water quantities, and understanding saturation levels. It also discusses the changes in solubility from 0 to 100 degrees Celsius, the formation of precipitates when solutions are cooled, and solubility trends and exceptions. The tutorial emphasizes careful reading of graphs and provides examples to illustrate key concepts.

Which salt is the least soluble in water at 20 degrees Celsius?

• NH3

• KClO3

• NaCl

• KCl

How many grams of potassium chloride can dissolve in 200 grams of water at 80 degrees Celsius?

• 200 grams

• 150 grams

• 100 grams

• 50 grams

At 40 degrees Celsius, how much potassium nitrate can dissolve in 300 grams of water?

• 129 grams

• 215 grams

• 172 grams

• 86 grams

Which salt shows the least change in solubility from 0 to 100 degrees Celsius?

• KNO3

• KClO3

• NaCl

• NH3

At 30 degrees Celsius, 90 grams of sodium nitrate in 100 grams of water is considered:

• Precipitated

• Saturated

• Unsaturated

• Supersaturated

How many grams of precipitate form when a saturated solution of potassium chlorate is cooled from 80 to 50 degrees Celsius?

• 20 grams

• 10 grams

• 40 grams

• 30 grams

Which compound shows a decrease in solubility with increasing temperature?

• NH3

• NaCl

• KNO3

• KClO3

Which salt is most soluble at 10 degrees Celsius?

• KClO3

• NaCl

• NH3

• KI

Which salt is least soluble at 50 degrees Celsius?

• KI

• NaCl

• NH3

• KClO3

At 90 degrees Celsius, which salt is the least soluble?

• KI

• KClO3

• NaCl

• NH3