Applied Chem Solubility Review

A student obtained the following data in determining the solubility of a substance. Which graph best represents the solubility curve drawn from the results obtained by the student?

• 
• 
• 
• 

According to Reference Table G, which substance forms an unsaturated solution when 80 grams of the substance is dissolved in 100 grams of H₂O at 10°C?

• KI

• KNO₃

• NaNO₃

• NaCl

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 g

• 10 g

• 15 g

• 20 g

An unsaturated solution is formed when 80. grams of a salt is dissolved in 100. grams of water at 40°C. This salt could be

• KCl

• KNO₃

• NaCl

• NaNO₃

Which compound decreases in solubility as the temperature of the solution is increased from 10°C to 50°C?

• NH₄Cl

• NaCl

• NH₃

• NaNO₃

Which compound shows the least increase in solubility in water from 50°C to 60°C?

• KCl

• NaCl

• KNO₃

• NaNO₃

When sodium chloride is dissolved in water, the resulting solution is classified as a

• heterogeneous compound

• homogeneous compound

• heterogeneous mixture

• homogeneous mixture

According to Reference Table G, which solution is saturated at 30°C?

• 12 grams of KClO₃ in 100 grams of water

• 12 grams of KClO₃ in 200 grams of water

• 30 grams of NaCl in 100 grams of water

• 30 grams of NaCl in 200 grams of water

A mixture of crystals of salt and sugar is added to water and stirred until all solids have dissolved. Which statement best describes the resulting mixture?

• The mixture is homogeneous and can be separated by filtration.

• The mixture is homogeneous and cannot be separated by filtration.

• The mixture is heterogeneous and can be separated by filtration.

• The mixture is heterogeneous and cannot be separated by filtration.

Hexane (C₆H₁₄) and water do not form a solution. Which statement explains this phenomenon?

• Hexane is polar and water is nonpolar.

• Hexane is ionic and water is polar.

• Hexane is nonpolar and water is polar.

• Hexane is nonpolar and water is ionic.