concentration units #1

When a solution is very concentrated, it has a high amount of _________ for a given amount of _________.

• solute to solvent
• solvent to solute
• solvent to solution
• solution to solute

A mixture with a little solute dissolved in solvent is 

• dilute
• concentrated
• saturated

Unit for concentration.  moles of solute / Liters of solution

• Molality
• Molarity
• Mass percent
• Mole fraction

What is the molarity of 200 mL of solution in which 2.0 moles of sodium bromide is dissolved?

• 2.0 M
• 10 M
• 0.40 M
• 4.0 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

If the percent (mass/mass) for a solute is 4% and the mass of the solution is 200 g, what is the mass of solute in the solution?

• 8.0 g
• 50 g
• 80 g
• 800 g

How many moles of solute are contained in 3.0 L of a 1.5 M solution?

• 4.5 moles
• 1.5 moles
• 2.0 moles
• 0.5 moles

Moles of solute= Molarity x Volume

• TRUE
• FALSE

Solution A - of 61g/50mL

Solution B - 21g/50mL

Solution C - 41g/50mL

Put them in order from most concentrated to least concentrated.

• A. B. C

• C, B, A

• A, C, B

• C, A, B

What is the molarity of 4 grams of sodium chloride (NaCl) in 3,800 mL of solution?

• 0.018 M
• 0.018 m
• 1.052 M
• 1.052 m