Regents solution review

In an aqueous solution of sodium chloride, the solute is

• Cl

• Na

• NaCl

• H₂O

Based on Reference Table F, which of the following saturated solutions would be the least concentrated?

• sodium sulfate

• potassium sulfate

• copper (II) sulfate

• barium sulfate

Based on Reference Table F, which salt is least soluble?

• FeCO₃

• Na₂CO₃

• BaCl₂

• CaCl₂

The solubility of KClO₃(s) in water increases as

• the temperature of the solution increases

• the temperature of the solution decreases

• pressure on the solution increases

• pressure on the solution decreases

Tags

NGSS.HS-PS3-4

Based on Reference Table G, what is the maximum number of grams of KCl(s) that will dissolve in 200 grams of water at 50°C to produce a saturated solution?

• 38 g

• 42 g

• 58 g

• 84 g

As the pressure on a gas confined above a liquid increases, the solubility of the gas in the liquid

• decreases

• increases

• remains the same

When 5 grams of KCl are dissolved in 50. grams of water at 25°C, the resulting mixture can be described as

• heterogeneous and unsaturated

• heterogeneous and supersaturated

• homogeneous and unsaturated

• homogeneous and supersaturated

What is the total number of moles of solute in 250 milliliters of a 1.0 M solution of NaCl?

• 1.0 mole

• 0.25 mole

• 0.50 mole

• 42 moles

A 2400.-gram sample of an aqueous solution contains 0.012 gram of NH₃. What is the concentration of NH 3 in the solution, expressed as parts per million?

• 5.0 ppm

• 15 ppm

• 20. ppm

• 50. ppm

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

Tags

NGSS.HS-PS3-4

NGSS.HS-PS1-2