Solutions Table G

A student uses 200 grams of water at a temperature of 60°C to prepare a saturated solution of potassium chloride, KCl.

Identify the solute in this solution. [1]

• potassium

• chloride

• potassium chloride

• 200 g of water

A student uses 200 grams of water at a temperature of 60°C to prepare a saturated solution of potassium chloride, KCl.

According to Reference Table G, how many grams of KCl must be used to create this saturated solution?

• 90 g

• 45 g

• 135 g

• 200 g

A student uses 200 grams of water at a temperature of 60°C to prepare a saturated solution of potassium chloride, KCl.

This solution is cooled to 10°C and the excess KCl precipitates (settles out). The resulting solution is saturated at 10°C.

How many grams of KCl precipitated out of the original solution?

• 30 g

• 45 g

• 15 g

• 60 g

Tags

NGSS.HS-PS1-5

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

• NaNO₃

• KNO₃

• NaCl

Sulfur dioxide, SO₂, is one of the gases that reacts with water to produce acid rain.

According to Reference Table G, describe how the solubility of sulfur dioxide in water is affected by an increase in water temperature.

• the solubility of SO₂ increases as water temperature increases

• the solubility of SO₂ decreases as water temperature increases

• the solubility of SO₂ stays the same as water temperature increases

Tags

NGSS.HS-ESS2-5

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

• 15 g

• 10. g

• 20. g

A scientist makes a solution that contains 44.0 grams of hydrogen chloride gas, HCl(g), in 200. grams of water, H2O(ℓ), at 20.°C.

Based on Reference Table G, identify, in terms of saturation, the type of solution made by the scientist.

• unsaturated

• saturated

• supersaturated

• all of these

A scientist makes a solution that contains 44.0 grams of hydrogen chloride gas, HCl(g), in 200. grams of water, H2O(ℓ), at 20.°C.

Explain, in terms of the distribution of particles, why the solution is a homogeneous mixture.

• a solution is a homogeneous mixture because the dissolved particles of solute collect on the bottom of the container of solvent

• a solution is a homogeneous mixture because the dissolved particles of solute are evenly distributed throughout the solvent

• a solution is a homogeneous mixture because the dissolved particles of solute collect at the surface of the solvent

• none of these is correct

How many grams of potassium chloride can be dissolved in 200 g of water at 80 degrees C?

• 50 g

• 100 g

• 150 g

• 25 g

A saturated solution of potassium chlorate is formed from 100 grams of water. If the saturated solution is cooled from 80 C to 50 C, how many grams of precipitate will form?

• 41 g

• 23 g

• 21 g

• none of these

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4