Checkpoint 7 Review

The solubility rules for various salts in water indicate most salts of ______ are not soluble in water.

• Li+

• Ag+

• K+

• Na+

A sample of 0.0255 mol potassium hydroxide, KOH, was dissolved in water to yield 0.10 L of solution. What is the molarity of the solution?

• 0.255 M

• 2.55 x 10^3 M

• 392 M

• 0.392 M

Which ion below always creates soluble ionic compounds, no matter what it is bonded with?

• K+

• Al^3+

• SO4^2-

• PO4^3-

Based on the chart, which trial would allow the greatest amount of solute to dissolve in water?

• Trial 1

• Trial 2

• Trial 3

• Trial 4

How many moles of solute would 3 liters of a 2 M solution contain?

• 1 mol

• 3 mol

• 6 mol

• 12 mol

Which compound is a nonelectrolyte?

• NaOH

• HCl

• C₆H₁₂O₆

• NaCl

What volume of 1.0 M sodium phosphate, to the nearest tenth of a liter, must be used to make 4.0 L of 0.80 M sodium phosphate?

• 0.32 L

• 3.2 L

• 4.0 L

• 32 L

Which method below will not speed up the rate of salt dissolving in water? Select TWO answers.

• Using larger salt rocks

• Decreasing the temperature of the solvent

• Stirring the solute into the solvent

• Heating the solvent before adding the solute

Which of the following substances is a strong electrolyte when dissolved in water? Select TWO answers.

• NaNO3

• KBr

• S2Cl2

• C12H22O11

Why does stirring help a solute dissolve faster (ie. the rate of dissolution)? (select 2)

• Agitation does not help the rate of dissolution.

• Agitation brings fresh water (solvent) molecules in contact with the solute, thereby increasing the rate of

  dissolution.

• Agitation of the solute particles will lead to their breakage into smaller particles leading to an increase in the rate of

  dissolution.

• Agitation makes the rate of dissolution slower.