Molarity & Dilutions

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 is molarity calculated?

Back

Molarity is calculated using the formula: M = moles of solute / liters of solution.

Front

What is the molarity of a solution with 1 mole of solute in 1 liter of solution?

Back

1 M (1 mole per liter).

Front

If you have 0.5 moles of NaCl in 0.25 L of solution, what is the molarity?

Back

2.0 M.

Front

What happens to the molarity when you dilute a solution?

Back

The molarity decreases when a solution is diluted.

Front

What is the formula for dilution?

Back

M1V1 = M2V2, where M is molarity and V is volume.

Front

If you add 56 mL of water to 34 mL of a 0.5 M NaBr solution, what is the new molarity?

Back

0.189 M.

Front

How do you convert grams of solute to moles?

Back

Use the formula: moles = grams / molar mass.

Front

What is the molarity of 4.00 grams of KNO3 in 3.80 L of solution?

Back

0.0104 M.

Front

How do you find the molarity of sulfuric acid in a solution?

Back

Use the formula: M = moles of H2SO4 / liters of solution.