Solutions Test Review

What is the correct formula to solve for the Molarity of a solution that has .4 moles of HCl in 9.5 L of solution?

• M = 9.5 L / .4 mol
• M₁V₁=M₂V₂
• M = .4 mol / 9.5 L
• none of the other choices

A sample of 0.0255 mol potassium hydroxide, KOH, was dissolved in water to yield 10.0 mL of
solution.  Which amount would you need to change to solve for molarity?

• change .0255 moles to grams
• change 10 mL to L
• change both values to grams and L
• leave it as it is

Which formula should you use to convert 2.00 L of 0.300 M sulfuric acid, how many mL of a 1.00 M stock solution should be
used?

• molarity formula
• dilution formula
• both will work
• neither will work

90 grams of sodium nitrate (NaNO3) are put into 100 grams of water and stirred. The final
mixture has a temperature of 20°C. About how many grams of the sodium nitrate dissolved?

• 23
• 73
• 80
• 88

Which of the following would decrease the rate of solution when dissolving a solid in water?

• Raise the temperature of the solution
• Crush the solid before mixing
• Stir the solution after mixing
• Use a single cube of solid

The substance being dissolved is called the ________

• solvent

• solid

• solute

• solvate

When no more solute dissolves the solution is _________

• supersaturated

• unsaturated

• saturated

• supercalifragilisticexpialidocious

Molarity is defined as _________ divided by ___________

• mol, liters

• mol, kg

• kg, liters

• liters, kg

How many mols of HCl are in 3 liters of 2.0M HCl solution?

• 2.0

• 1.5

• 6.0

• 0.66

What is a "homogeneous mixture of two or more substances in a single phase"?

• Solution
• Solvent
• Solute
• Compound