Solubility and Solutions

You can make a solid solute dissolve more quickly in a solvent by

• adding more solute.

• adding ice.

• heating the solvent.

• removing some solvent.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

A solution that contains all of the solute it can hold at a given temperature is

• diluted.

• saturated.

• supersaturated.

• unsaturated.

Three 10 g samples of sugar are represented below.

Sample A dissolves in water more slowly than sample B.

Sample B dissolves more slowly than sample C.

Which of the following best explains why sample A dissolves more slowly than the other two?

• It has the most volume.

• It has the smallest surface area.

• It has the largest number of sugar molecules.

• It has the fewest bonds between sugar modules.

Tags

NGSS.MS-PS1-2

A technican prepared a solution by heating 100 mL of distilled water while adding KCl crystals until no more KCl would dissolve. She then capped the clear solution and set it aside on the lab counter. After several hours she noticed the solution had become cloudly and some solid had settled to the bottom of the flask. Which statement best describes what happened?

• As the solution cooled, evaporation of water increased the KCl concentration beyond its solubility.

• Water molecules, trapped with the KCl crystals, were released after heating.

• At lower temperatures the solubility of KCl decreased and recrystallization occurred.

• At increased temperatures the solubility of KCl increased and remained too high after cooling.

Tags

NGSS.MS-PS1-4

What is solubility?

• different materials placed together but keeping their own properties

• a mixture in which substances spread out evenly and will not settle

• the degree to which a material will dissolve in another substance

• the substance in a solution that has the greatest amount ions

• the substance in a solution that has the least amount ions

What is a saturated solution?

• A solution that can dissolve more solute

• A solution that cannot dissolve more solute at a given temperature

• A solution with no solute

• A solution that changes color when saturated

Match the following definitions.

• Supersaturated

• Contains the maximum amount of solute that will dissolve at that temperature.

• Unsaturate

• Contains less than the maximum amount of solute that can be dissolved at that temperature.

• Saturated

• Contains more than the maximum amount of solute that can be dissolved at that temperature.

What does solubility refer to?

• The ability of a solvent to dissolve a solute

• The ability of a solute to dissolve in a solvent

• The maximum amount of solute that can dissolve in a solvent at a given temperature

• The rate at which a solute dissolves in a solvent

An unsaturated solution contains ​ (a)   than the maximum amount of solute that can be dissolved at that temperature.

• less

• maximum

• more

• crystallize

The ability of a solute to be dissolved is called its

• nature

• mixture

• solubility

• solvent

Tags

NGSS.MS-PS1-2