Semester 2 Review

At approximately what temperature does the solubility of NaCl match the solubility of K₂Cr₂O₇?

• 60ºC

• 30ºC

• 50ºC

• 83ºC

How many grams of K₂Cr₂O₇ are soluble in 100 g of water at 95ºC?

• 83 grams

• 75 grams

• 40 grams

• 12 grams

Imagine 25 grams of NaCl are dissolved in 100 mL of water at 60ºC. How many more grams need to be dissolved for the solution to be saturated?

• 13 grams

• 25 grams

• 6 grams

• 38 grams

How many grams of K₂Cr₂O₇ are soluble in 100 g of water at 90ºC?

• 85 grams

• 70 grams

• 40 grams

• 15 grams

How many grams of K₂Cr₂O₇, are soluble in 50 g of water at 90ºC?

• 70 grams

• 35 grams

• 140 grams

• 105 grams

Which substance is most soluble at 0ºC?

• KI

• NaNO₃

• NaCl

• Ce₂(SO₄)₃

When 20 grams of KClO₃ is dissolved in 100 grams of water at 80ºC, the solution can be correctly described as:

• supersaturated

• saturated

• unsaturated

When 20 grams of KNO₃ is dissolved in 100 grams of water at 30ºC, the solution can be correctly described as:

• supersaturated

• saturated

• unsaturated

When 50 grams of KCl is dissolved in 100 grams of water at 50ºC, the solution can be correctly described as:

• supersaturated

• unsaturated

• saturated

When 42 grams of KCl is dissolved in 100 grams of water at 50ºC, the solution can be correctly described as:

• supersaturated

• saturated

• unsaturated