Solubility and Temperature Relationships

The video tutorial by Miss McCauley covers solubility curves, explaining how temperature affects the solubility of various compounds. It discusses general trends, such as most salts increasing in solubility with temperature, while some gases decrease. The tutorial includes calculations for solubility based on water volume and temperature, and explains concepts like saturation and precipitation. It concludes with a preparation for a virtual solubility lab.

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

• Temperature in degrees Celsius

• Volume of water

• Pressure in atmospheres

• Amount of solute

Which of the following statements is generally true about solubility and temperature?

• Solubility remains constant regardless of temperature.

• Solubility decreases with increasing temperature for all gases.

• Solubility increases with increasing temperature for most salts.

• Solubility decreases with increasing temperature for all compounds.

At 20 degrees Celsius, which salt is the least soluble?

• Ammonia

• Potassium chlorate

• Potassium iodide

• Sodium chloride

If the amount of water is doubled, how does the solubility of a salt change?

• It triples.

• It halves.

• It doubles.

• It remains the same.

At 30 degrees Celsius, 90 grams of sodium nitrate is dissolved in 100 grams of water. Is the solution saturated, unsaturated, or supersaturated?

• Cannot be determined

• Supersaturated

• Unsaturated

• Saturated

What happens to a saturated solution of potassium chlorate when it is cooled from 80 to 50 degrees Celsius?

• It becomes unsaturated.

• It remains saturated.

• Precipitate forms.

• It becomes supersaturated.

Which compound shows a decrease in solubility from 0 to 100 degrees Celsius?

• Potassium chlorate

• Ammonia

• Sodium chloride

• Potassium iodide

Which salt is most soluble at 10 degrees Celsius?

• Sodium chloride

• Ammonia

• Potassium chlorate

• Potassium iodide

At 50 degrees Celsius, which salt is the least soluble?

• Potassium iodide

• Ammonia

• Sodium chloride

• Potassium chlorate

Which salt is least soluble at 90 degrees Celsius?

• Ammonia

• Potassium chlorate

• Sodium chloride

• Potassium iodide