Molarity, Molality, BP/FP

What is the formula of molality?

• m = kg / mol

• m = kg * mol

• m = lwh

• m = mol / kg

The solvent is given in grams. How do you get Kg?

• Divide by 1,000

• Multiply by 1,000

• Nothing

• Divide by molar mass

The solute is given in grams. How do you get moles?

• Divide by 1,000

• Multiply by 1,000

• Nothing

• Divide by molar mass

If you have 5 moles of solute and 5000 grams of solvent, what is the molality?

• 25 m

• 0.05 m

• 1 m

• 0.1 m

Calculate the molality if you have 0.1 moles of solute and 300 grams of solvent.

• 0.9 mol/L

• 0.01 m

• 0.33 m

• 30 mol/kg

What is the molality of a solution which contains 30.0 g of CaCl₂ dissolved in 150 g of H₂O

• 2.6 m

• 1.8 m

• 0.2 m

• 0.05 m

What is the molality of a solution which contains 32.0 g of NaCl dissolved in 2 kg of H₂O

• 2.8 m

• 1.8 m

• 0.28 m

• 1.1 m

Molarity's equation:

• mol/L = M

• L / M = mol

• L * M = mol

• L * mol = M

You have 3 moles of glucose in a 4.0L solution, what is the molarity of the solution?

• 3 M

• 12 M

• 0.75 M

• 1 M

What is the molarity of a solution containing 46 g of NaCl in .5L of solution?

(molar mass of NaCl: 36 g/mol)

• .5 M

• 92 M

• 2.7 M

• 1.6 M