Quiz on Solution Concentration

What is the definition of concentration?

• The amount of solute in a solution

• The amount of solvent in a solution

• The total volume of a solution

• A measure of how much solute is dissolved in a specific amount of solvent or solution

What are the units of molarity?

• mol/kg

• g/100 mL

• mol/L

• g/L

How is molality defined?

• The mass of solute per volume of solution

• The ratio of moles of solute per kilogram of solvent

• The ratio of moles of solute to moles of solvent

• The number of moles of solute per liter of solution

What is the molarity of a solution containing 5 grams of NaCl in 250 mL of solution?

• 0.100 M

• 0.500 M

• 0.200 M

• 0.342 M

What is the effect of temperature on molarity?

• It decreases molarity

• It can either increase or decrease molarity

• It increases molarity

• It does not affect molarity

What is percent by volume?

• The concentration of a solution in molarity

• The mass of solute divided by the total mass of solution

• The volume of solute divided by the total volume of solution

• The number of moles of solute divided by the number of moles of solvent

How do you calculate percent by mass?

• Moles of solute divided by moles of solvent times 100

• Volume of solute divided by total volume of solution times 100

• Mass of solute divided by total mass of solution times 100

• Molarity times volume of solution

What is the mole fraction of a solute?

• The mass of solute divided by the volume of solution

• The concentration of a solution in percent

• The number of moles of solute per liter of solution

• The ratio of moles of solute to total moles of solute and solvent

What is a concentrated solution?

• A solution with a small amount of solute

• A solution with a large amount of solute

• A solution with equal amounts of solute and solvent

• A solution that is saturated

What is the first step in preparing a dilute solution from a concentrated solution?

• Add solute to the solvent

• Measure out the specific volume of stock solution

• Mix the solution thoroughly

• Heat the solution