Solubility Unit Check-In Part 1

Potassium chloride dissolved in pure water is an example of

• an ionic compound dissolved in a polar solvent

• an ionic compound dissolved in a nonpolar solvent

• a covalent compound dissolved in a polar solvent

• a covalent compound dissolved in a nonpolar solvent

According to Table G, which of these substances is most soluble at 60^oC?

• NaCl

• KCl

• KClO₃

• HCl

The solubility of NaNO₃ (s) in water increases as the

• temperature of the solution increases

• temperature of the solution decreases

• pressure of the solution increases

• pressure of the solution decreases

An unsaturated aqueous solution of NH₃ is at 90°C in 100. grams of water. According to Reference Table G, how many grams of NH₃ could this unsaturated solution contain?

• 5 grams

• 10 grams

• 15 grams

• 20 grams

At standard pressure, which substance becomes less soluble in water as temperature increases from 10.°C to 80.°C?

• KCl

• HCl

• NaCl

• NH₄Cl

Carbon dioxide gas is least soluble in water under conditions of

• high pressure and low temperature

• high pressure and high temperature

• low pressure and low temperature

• low pressure and high temperature

The diagram below which represents the solubility curve of salt X. The four points on the diagram represent four solutions of salt X. Which point represents a supersaturated solution of salt X?

• A

• B

• C

• D

According to Reference Table G, how many grams of KClO₃ must be dissolved in 100 grams of H₂O at 70°C to be saturated?

• 39 g

• 18 g

• 36 g

• 72 g

What is the mass of NH₄Cl that must dissolve in 200. grams of water at 50.°C to make a saturated solution?

• 26 g

• 42 g

• 84 g

• 104 g

One hundred grams of water is saturated with NH₄Cl at 50°C. According to Table G, if the temperature is lowered to 10°C, what is the total amount of NH₄Cl that will precipitate?

• 5.0 g

• 17 g

• 30 g

• 50 g