Unit 11: Dilution Theory

Front

What is dilution in chemistry?

Back

Dilution is the process of reducing the concentration of a solute in a solution, usually by adding more solvent.

Front

What is the formula for calculating molarity (M)?

Back

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

Front

What does the term 'molar' represent in a solution?

Back

The term 'molar' represents the concentration of a solution, specifically the number of moles of solute per liter of solution, denoted as M.

Front

How does dilution affect the volume and molarity of a solution?

Back

As a solution is diluted, the volume increases and the molarity (M) decreases.

Front

What is the relationship between initial and final concentrations and volumes in dilution?

Back

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

Front

If you have 10.0 M NaOH, how much is needed to prepare 300.0 mL of 2.00 M NaOH?

Back

60.0 mL of 10.0 M NaOH is needed.

Front

What is the molarity of a solution made by diluting 26.5 mL of 6.00 M HNO3 to a volume of 250.0 mL?

Back

0.636 M.

Front

What happens to the number of moles of solute during dilution?

Back

The number of moles of solute remains constant during dilution.

Front

What is the unit of molarity?

Back

The unit of molarity is moles per liter (mol/L), often abbreviated as M.

Front

What is the effect of adding more solvent to a concentrated solution?

Back

Adding more solvent decreases the concentration (molarity) of the solution.