Concentration Mixtures and Solutions

Which statement about substances is true?

• A substance cannot be separated from a mixture.

• If two or more substances are physically blended, the new blend is called a compound.

• Substances can be elements or solutions.

• When two or more substances are evenly mixed, we can separate them physically.

Tags

NGSS.MS-PS1-2

Which statement about solutions and homogeneous mixtures is correct?

• Solutions are liquid, but homogeneous mixtures can be any state of matter.

• Solutions are made up of two elements mixed together, but homogeneous mixtures are made from two compounds mixed together.

• Solutions can only be separated by chemical reactions, but homogeneous mixtures can be separated by physical changes.

• Solutions and homogeneous mixtures are actually the same thing.

A solution is always the same _____________ as its solvent.

• state of matter

• color

• smell

• texture

Solubility is the ability of a solute to dissolve into a solution. Which of the following statements is true about solubility?

• More solute can dissolve in a solution if its solubility is high.

• More solute can dissolve in a solution if its solubility is low.

• Less solute can dissolve in a solution if its solubility is high.

• The amount of solute that can dissolve depends on the solvent, not solubility.

Tags

NGSS.MS-PS1-2

In which way is solubility different than concentration?

• Unlike concentration, solubility does not depend on the amount solvent.

• Solubility can change based on temperature and pressure, but concentration can only change due to the total volume of solution.

• Solubility is a measurement of how much solute can possibly dissolve, but concentration is a measurement of how much solute is dissolved.

• Unlike concentration, solubility depends on the amount of solute dissolved in the total solution.

Which substance has the lowest solubility at 100 °C?

• KCl

• NaCl

• KClO₃

• Ce₂(SO₄)₃

Tags

NGSS.MS-PS1-4

Which substance has the highest solubility at 40 ^oC?

• KCl

• NaCl

• KClO₃

• Ce₂(SO₄)₃

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following statements about pressure and solubility is true?

• Pressure increases the solubility of solids in solution.

• Pressure increases the solubility of gases in solution.

• Pressure increases the solubility of liquids in solution.

• Pressure has no effect on solubility.

Define Concentration

• It is the ratio of the amount of a "solute" compared to the amount of a "solvent" in a solution.

• It is the ratio of the amount of a "solvent" compared to the amount of a "solution" in a "solute"

• It is the ratio of the amount of a base substance compared to an acid substance in a solution.

• It is the ratio of the number of "moles" in a solution compared to the "molarity".

Tags

NGSS.HS-PS1-5

If we are making Kool-aid with sugar, Kool-aid powder, and water, which part is the solvent?

• water

• powder

• sugar

• powder and sugar