Test Review on Molarity and Dilution

Front

What is molarity?

Back

Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution.

Front

How do you calculate molarity?

Back

Molarity (M) = moles of solute / liters of solution.

Front

What happens to the molarity when you dilute a solution?

Back

The molarity decreases as the volume of the solution increases.

Front

What is the formula for dilution?

Back

C1V1 = C2V2, where C is concentration and V is volume.

Front

If you have a 1.0 M solution and dilute it to 2.0 L, what is the new concentration if you add 1.0 L of solvent?

Back

The new concentration will be 0.67 M.

Front

What is the purpose of diluting a solution?

Back

To achieve a desired concentration for experiments or reactions.

Front

How do you prepare a dilution from a concentrated solution?

Back

Add a specific volume of the concentrated solution to a larger volume of solvent.

Front

What is the molarity of a solution containing 58.5 g of NaCl in 1 L of solution? (Molar mass of NaCl = 58.5 g/mol)

Back

1 M.

Front

How many moles are in 0.5 L of a 2 M solution?

Back

1 mole.

Front

What is the effect of adding more solute to a solution?

Back

The concentration (molarity) of the solution increases.