Dilutions Worksheet 1

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 molarity of a diluted solution?

Back

Molarity after dilution = (Molarity before dilution) x (Volume before dilution) / (Total volume after dilution).

Front

What happens to the molarity when you dilute a solution?

Back

The molarity decreases as the volume of the solution increases when more solvent is added.

Front

What is the formula for dilution?

Back

M1V1 = M2V2, where M1 and V1 are the molarity and volume of the initial solution, and M2 and V2 are the molarity and volume after dilution.

Front

If 100 mL of a 0.35 M NaOH solution is diluted to 150 mL, what is the new molarity?

Back

0.23 M.

Front

How do you find the volume of water needed to dilute a solution?

Back

Subtract the final volume from the initial volume to find the volume of water added.

Front

What is the effect of evaporation on solution concentration?

Back

Evaporation decreases the volume of the solution, increasing the concentration (molarity) of the solute.

Front

How do you calculate the original volume of a concentrated solution after evaporation?

Back

Use the formula: V1 = (C2V2) / C1, where C1 is the original concentration, C2 is the final concentration, and V2 is the final volume.

Front

What is the molarity of a solution after diluting 500 mL of a 3.79 M NH4Cl solution to 2.00 L?

Back

0.95 M.

Front

What is the relationship between volume and molarity in dilution?

Back

As the volume increases, the molarity decreases if the amount of solute remains constant.