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 molarity?

Back

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

Front

What is the formula for dilution?

Back

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

Front

If 125.0 mL of 2.00 M calcium hydroxide is diluted to 1.50 M, how much water is added?

Back

42.0 mL.

Front

How do you find the molarity of a solution?

Back

Molarity = moles of solute / volume of solution in liters.

Front

What is the molarity of a solution made by dissolving 0.50 mole of NaCl in 400.0 mL of water?

Back

1.25 M.

Front

How many grams of NaOH are in 0.01 L of a 2.0 M solution?

Back

0.8 grams.

Front

What happens to the concentration of a solution when more solvent is added?

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

.188 M.

Front

What is the relationship between volume and concentration in dilutions?

Back

Increasing the volume of solvent decreases the concentration of the solution.