Solutions Unit Test

If a solution has the ability to dissolve more salt, it is classified as _______________.

• supersaturated
• saturated
• unsaturated
• monosaturated

The unit for molarity is ________ and it is used to describe the ____________ of a solution.

• Mole, Polarity
• Mole, Concentration
• M, Polarity
• M, Concentration

If a student wants to increase the concentration of a solution, the easiest thing to do is ...

• add more solvent

• add more solute

• remove some solvent

• remove some solute

Tags

NGSS.HS-PS1-5

What will happen to the concentration if more solvent is added to the solution?

• the concentration will increase
• the concentration will decrease
• the concentration will remain the same

Describe an unsaturated solution

• Solvent can dissolve more solute
• Solvent cannot dissolve more solute
• Solute can start dissolving
• Solute can dissolve like substances

Which of the following would have the slowest rate of dissolution?

• a sugar cube in hot water
• a sugar cube in cool water
• powdered sugar in cool water
• powdered sugar in hot water

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

The "like dissolves like" rule is the reason why water cannot dissolve

• salt
• sugar
• vinegar
• oil

What is the molarity of a solution that contains 0.3 moles sugar in 2.5 liters of solution?

• 8.33 m
• 0.12 m
• 0.12 M
• 8.33 M

What is the molarity of 4 grams of sodium chloride in 3.8 liters of solution? Molar mass NaCl=58.5g/mol.

• 0.018 M

• 0.018 m

• 1.052 M

• 1.052 m

How many moles of Na₂SO₄ is needed to make 2.5 L of 2.0 M solution?

• 5 moles
• 1 moles
• 1.25 moles
• 0.80 moles

Tags

NGSS.HS-PS1-7