Molarity & Dilution

Front

What is molarity?

Back

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

Front

What is the formula for calculating molarity?

Back

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

Front

How do you calculate the number of moles from molarity and volume?

Back

Moles = Molarity (M) x Volume (L)

Front

What is the molarity of 3 moles of hydrochloric acid in 3 liters of water?

Back

1 M

Front

If you dilute a solution, what happens to its molarity?

Back

The molarity decreases as more solvent is added.

Front

What is the effect of dilution on the number of moles of solute?

Back

The number of moles of solute remains constant during dilution.

Front

What is the molar mass of NaOH?

Back

40 grams/mol

Front

Which of the following is an example of a solvent?

Back

Water

Front

What happens to the concentration of a solution when you add more solvent?

Back

The concentration decreases.

Front

If you have 340 mL of a 0.5 M NaBr solution and add 560 mL of water, what is the new concentration?

Back

0.188 M