Regents Chemistry Table G

According to Table G, which substance forms an unsaturated solution when 80. grams of the substance are stirred into 100. grams of H₂O at 10.°C?

• KNO₃

• KI

• NH₃

• NaCl

Which compound becomes less soluble in water as the temperature of the solution is increased?

• HCl

• KCl

• NaCl

• NH₄Cl

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

When 10 grams of KClO₃ are dissolved in 50. grams of water at 25°C, the resulting mixture can be described as

• heterogeneous and saturated

• heterogeneous and supersaturated

• homogeneous and saturated

• homogeneous and supersaturated

A solution contains 35 grams of KNO₃ dissolved in 100 grams of water at 40°C. How much more KNO₃ would have to be added to make it a saturated solution?

• 29 g

• 24 g

• 12 g

• 4 g

A saturated solution of NaNO₃ is prepared at 60.ºC using 100. grams of water. As this solution is cooled to 10.ºC, NaNO₃ precipitates (settles) out of the solution. The resulting solution is saturated. Approximately how many grams of NaNO₃ settled out of the original solution?

• 46 g

• 61 g

• 85 g

• 126 g

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 KClO₃ in 200 grams of water

• 30 grams of KClO₃ in 100 grams of water

A solution is formed by dissolving 45 grams of NH₄Cl in 100 grams of H₂O at 70ºC. Which statement correctly describes this solution?

• NH₄Cl is the solute, and the solution is saturated.

• NH₄Cl is the solute, and the solution is unsaturated.

• NH₄Cl is the solvent, and the solution is saturated.

• NH₄Cl is the solvent, and the solution is unsaturated.

How many grams of KCl must be dissolved in 200 grams of water to make a saturated solution at 60°C?

• 30 g

• 45 g

• 56 g

• 90 g

Which compound is insoluble in water?

• KOH

• NH₄Cl

• Na₃PO₄

• PbSO₄