Molarity and 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 do you calculate the number of grams needed to prepare a solution?

Back

To calculate grams needed: grams = molarity (M) × volume (L) × molar mass (g/mol).

Front

What is the formula for dilution?

Back

The formula for dilution is M1V1 = M2V2, where M1 and V1 are the molarity and volume of the concentrated solution, and M2 and V2 are the molarity and volume of the diluted solution.

Front

What is the molar mass of AgNO3?

Back

The molar mass of AgNO3 (Silver Nitrate) is 169.87 g/mol.

Front

How many grams of AgNO3 are needed to prepare a 0.125M solution in 250 mL of water?

Back

5.3g.

Front

What volume of 1.50 M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?

Back

100 mL.

Front

If you have 0.750 moles of NaOH in a 0.500 M solution, what is the volume in milliliters?

Back

1500 mL.

Front

How do you convert mL to L?

Back

To convert mL to L, divide the volume in mL by 1000.

Front

What volume of 10.0 M NaOH is needed to prepare 300 mL of 2.00 M NaOH by dilution?

Back

60.0 mL.

Front

What is the relationship between moles, molarity, and volume?

Back

Moles = Molarity × Volume (L).