Molarity and Molality Flashcard

Front

What is molarity?

Back

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

Tags

NGSS.HS-PS1-5

Front

What is the formula to calculate molarity?

Back

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

Front

What is molality?

Back

Molality (m) is a measure of concentration defined as the number of moles of solute per kilogram of solvent.

Tags

NGSS.HS-PS1-5

Front

What is the formula to calculate molality?

Back

Molality (m) = moles of solute / kilograms of solvent.

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance (grams/mole).

Front

How do you find the number of moles from molarity and volume?

Back

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

Front

How do you find the volume from moles and molarity?

Back

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

Front

How do you find the mass of solvent needed for a given molality?

Back

Mass of solvent (kg) = moles of solute / molality (m).

Front

What is the relationship between molarity and molality?

Back

Molarity is based on the volume of the solution, while molality is based on the mass of the solvent.

Front

If you have 0.45 mol of KOH in 0.674 L of solution, what is the molarity?

Back

0.67 M.