Molarity and Dilutions Review

Front

What does the term 'molar' represent in chemistry?

Back

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

Front

How do you calculate the molarity of a solution?

Back

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

Front

What is the formula for diluting a solution?

Back

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

Front

If you dilute a solution, what happens to its molarity?

Back

The molarity decreases as the volume increases while the amount of solute remains constant.

Front

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250 mL?

Back

0.636 M.

Front

How many mL of 1.0M KBr solution are needed to prepare 250 mL of a 0.2M dilution?

Back

50 mL.

Front

What is the sweetest concentration of a sweet tea solution?

Back

3.1M is expected to taste the sweetest.

Front

If 0.775 L of 1.00 M NaOH is diluted to 1.00 L, how many moles of NaOH are in the resulting solution?

Back

0.775 mol NaOH.

Front

What is the unit of molarity?

Back

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

Front

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

Back

The concentration decreases because the amount of solute remains the same while the volume increases.