Solubility and Solutions

Which would NOT increase the rate at which a sugar cube dissolves?

• Reducing the amount of solvent

• Crushing the sugar cube

• Stirring the solution

• Heating the solvent

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

• adding more solute.

• adding ice.

• heating the solvent.

• removing some solvent.

Tags

NGSS.HS-PS1-5

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

• diluted.

• saturated.

• supersaturated.

• unsaturated.

The amount of solute that can be dissolved in a specific amount of solvent at a given temperature is its

• concentration.

• density.

• dilution.

• solubility.

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.

A student pours mineral salts into a bottle of cold water. Which of the following best explains why shaking the bottle will affect the dissolving rate of the salt?

• Shaking exposes the salts to the solvent more quickly.

• Shaking helps more water evaporate.

• Shaking equalizes the water temperature.

• Shaking causes more ions to precipitate out of solution.

Tags

NGSS.MS-PS1-2

The solubility graph below shows the amounts of four substances that will dissolve in 100 grams of water at various water temperatures.

Which substance has 80 grams of solute dissolved in 100 grams of water at 50 C?

• Potassium Bromide

• Ammonium Chloride

• Potassium Chloride

• Lithium Hydroxide

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of the following would most likely undergo dissociation when dissolved in water? (remember like dissolves like)

• iodine (I₂)

• butane (C₄H₁₀)

• potassium bromide (KBr)

• propane (C₃H₈)

Tags

NGSS.HS-PS1-3

Solution where more solute can still be dissolved at the given temperature. 

• Saturated
• Unsaturated
• Mixture
• Homogeneous solution

Describe a solute.

• part of solution present in largest amount
• gets dissolved
• water
• surrounds and breaks apart