Molarity and Dilution Calculations

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 stock solution, and C2 and V2 are the concentration and volume of the diluted solution.

Front

What is the molarity of 0.0684 mol of NaCl in 3.8 L of solution?

Back

0.018 M

Front

What is the molarity of a solution made by diluting 10 mL of a 13 M stock solution to 300 mL?

Back

0.43 M

Front

How many moles of potassium bromide are in 0.045 L of 0.465 M solution?

Back

0.0209 mol

Front

What is the molarity of a solution prepared by diluting 250 mL of 6 M hydrochloric acid to 1 L?

Back

1.5 M

Front

What volume is needed to make a 2.45 M solution of KCl using 0.50 mol of KCl?

Back

0.20 L

Front

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

Back

Moles = Molarity x Volume (in liters).

Front

What does it mean to dilute a solution?

Back

Diluting a solution means to decrease its concentration by adding more solvent.