Quick check: mole fraction, Molarity, Solubility, and Dilutions

Determine the mole fraction of SOLUTE in a solution with 2 moles of acetic acid (C2H4O2 / vinegar) and 2 moles of water.

• .5
• .25
• 1
• .2

When the volume of solvent increases, the mass of solute that can dissolve in a saturated solution...

• increases

• decreases

• stays the same

In general as temperature decreases, the solubility...

• increases

• decreases

• stays the same

Tags

NGSS.MS-PS1-4

Which is an example of a solute?

• Egg whites
• Sugar
• Water
• Acetone

Which sweet tea would you expect to taste the sweetest?

• 1M
• 3M
• 3.1M
• 2.5M

Tags

NGSS.HS-PS1-5

True or False: Molarity can be determined by knowing either the number of moles OR the volume of the solution alone.

• True

• False

What does the solute dissolve in?

• solvent
• mixture
• solute

Calculate the molarity of a solution containing 1.5 moles of NaCl in 0.5 L of solution

• 1.5

• 0.33 M

• 30 M

• 3 M

How many grams of AgNO₃ (MM = 169.87) are needed to prepare 0.125M solution in 250 mL of water? 

• .03g
• 0.5g
• 5.3g
• 84.9g

Tags

NGSS.HS-PS1-7

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250 mL?

• 15.9 M
• 0.636 M
• 0.642 M
• 1.59 M