Molarity

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 molarity of a solution made by adding 1.565 moles of PbNO3 to 0.5 L?

Back

3.13 M

Front

Which solution is more diluted: 1000 mL of water with 60g of salt or 500 mL of water with 60g of salt?

Back

1000 mL of water with 60g of salt is more diluted.

Front

How many grams of KCl are in 5.50 L of a 0.250 M solution of KCl? (Molar mass of KCl = 74.55 g/mol)

Back

103 g

Front

How many liters are required to make 3.5 M hydrochloric acid using 1.1 moles?

Back

0.31 L

Front

Which solution is more concentrated: 500 mL of water with 100 g of salt or 500 mL of water with 90 g of salt?

Back

500 mL of water with 100 g of salt is more concentrated.

Front

What is the formula to find the number of moles from molarity and volume?

Back

Number of moles = Molarity (M) × Volume (L).

Front

If you have a 2 M solution, how many moles are in 3 L?

Back

6 moles (2 M × 3 L = 6 moles).

Front

What is the relationship between dilution and concentration?

Back

Dilution decreases concentration by adding more solvent, while concentration increases by adding more solute.