Solutions to solutions

In a 0.1 molar solution of NaCl in water, which one of the following will be closest to 0.1?

• Mole fraction of NaCl

• Mass fraction of NaCl

• Mass percent of NaCl

• molality of NaCl

Solute B 200 g/mole

Solvent A 20 g/mole

400 grams of each is combined to form a solution occupying 640 mL

density?

• 1.00 g/mL

• 0.625 g/mL

• 1.25 g/mL

• 1.60 g/mL

Solute B 200 g/mole

Solvent A 20 g/mole

400 grams of each is combined to form a solution occupying 640 mL

Molarity?

• 3.125 M

• 5.000 M

• 0.0909 M

• 0.500 M

Solute B 200 g/mole

Solvent A 20 g/mole

400 grams of each is combined to form a solution occupying 640 mL

molality?

• 3.125 m

• 0.500 m

• 5.000 m

• 0.0909 m

Which leads to an exothermic mixing?

Each phrase is the absolute value of an energy.

• Expand solvent < Expand solute + interacting solute and solvent.

• Expand solvent + Expand solute < interacting solute and solvent.

• Expand solvent + Expand solute > interacting solute and solvent.

• Expand solvent > Expand solute + interacting solute and solvent.

Which leads to an endothermic mixing?

Each phrase is the absolute value of an energy.

• Expand solvent + Expand solute > interacting solute and solvent

• Expand solvent + Expand solute < interacting solute and solvent

• Expand solvent < Expand solute + interacting solute and solvent

• Expand solvent > Expand solute + interacting solute and solvent

Which ion will have the most exothermic heat of solvation?

• Lithium

• Sodium

• Potassium

• Caesium

Which solute will be most soluble in CCl₄?

• NaCl

• CH₃CH₂OH

• CH₃OCH₃

• Cl₂CH₂

Which is most soluble in water?

• CH₃(CH₂)₂OH

• CH₃(CH₂)₄OH

• CH₃(CH₂)₆OH

• CH₃CH₂OH

What does this illustrate?

(more than one choice is possible.)

• Water has a high vapor pressure

• Water has a higher vapor pressure than an aqueous solution.

• Water has a lower vapor pressure than an aqueous solution.

• The solute in this solution is nonvolatile.