Molarity

Front

What is Molarity?

Back

Molarity (M) is a measure of the concentration of a solute in a solution, defined as the number of moles of solute per liter of solution.

Front

How is Molarity calculated?

Back

Molarity is calculated using the formula: M = moles of solute / liters of solution.

Front

What is the unit of Molarity?

Back

The unit of Molarity is moles per liter (mol/L or M).

Front

True or False? A higher concentration means more solute in a solution.

Back

True.

Front

If you have 2 moles of NaCl in 1 liter of solution, what is the Molarity?

Back

2 M.

Front

How many moles of solute are in a 0.5 M solution of NaCl in 2 liters of water?

Back

1 mole.

Front

What is the Molarity of a solution made by dissolving 0.5 moles of KCl in 0.25 L of water?

Back

2 M.

Front

How do you dilute a solution?

Back

To dilute a solution, add more solvent to decrease the concentration of the solute.

Front

What is the relationship between Molarity and volume during dilution?

Back

M1V1 = M2V2, where M1 and V1 are the initial molarity and volume, and M2 and V2 are the final molarity and volume.

Front

How many mL of a 10 M solution are needed to make 500 mL of a 2 M solution?

Back

100 mL.