Test Review on Molarity and Dilution

Front

What is Molarity (M)?

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 a solution is diluted?

Back

The molarity decreases as the volume of the solution increases.

Front

What is the formula for dilution?

Back

C1V1 = C2V2, where C1 and V1 are the concentration and volume of the stock solution, and C2 and V2 are the concentration and volume of the diluted solution.

Front

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

Back

Adding more solvent increases the volume and decreases the molarity of the solution.

Front

How many moles of solute are in 1 L of a 0.5 M solution?

Back

0.5 moles of solute.

Front

What is the molarity of a solution containing 58.44 g of NaCl in 1 L of solution? (Molar mass of NaCl = 58.44 g/mol)

Back

1 M.

Front

If you have 2 L of a 3 M solution, how many moles of solute do you have?

Back

6 moles of solute.

Front

What is the molarity of a solution if 10 g of KCl is dissolved in 500 mL of solution? (Molar mass of KCl = 74.55 g/mol)

Back

0.27 M.

Front

What is the definition of a stock solution?

Back

A stock solution is a concentrated solution that can be diluted to a lower concentration for use.