De Chem 5.2-5.3 Warm-up

Front

What is molarity?

Back

Molarity is a measure of concentration defined as the number of moles of solute per liter of solution (moles/liters).

Front

How do you calculate the number of moles from mass and molar mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the molarity of a solution containing 63 grams of sodium chloride in 650 mL of solution?

Back

1.7 M.

Front

If you have 0.045 L of 0.465 M potassium bromide, how do you calculate the number of moles present?

Back

Moles = Molarity x Volume (L) = 0.465 M x 0.045 L = 0.0209 mol.

Front

What is the formula for diluting a concentrated solution?

Back

C1V1 = C2V2, where C1 and V1 are the concentration and volume of the concentrated solution, and C2 and V2 are the concentration and volume of the diluted solution.

Front

How many moles are in 600 grams of C12H22O11 (molar mass = 342 g/mol)?

Back

Number of moles = 600 g / 342 g/mol = 1.75 mol.

Front

What is the molarity of 600 grams of C12H22O11 in 2.0 L of solution?

Back

0.88 M.

Front

How do you convert milliliters to liters?

Back

To convert mL to L, divide the volume in mL by 1000.

Front

What volume of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?

Back

60.0 mL.

Front

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

Back

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