Molality Worksheet With Answers

Molality Worksheet

Chemistry

1. What is the molality of a solution made from 2.4 moles of NaCl and 0.80 kg of water?

2. What is the molality of a solution made from 63 g of HNO

in 0.50 kg of water?

3. 25 g of NaOH is dissolved in 120 g of water. What is the molality?

4. How much water is needed to make a 1.40 m solution from 0.400 moles of H

5. How much water is needed to make a 0.50 m solution from 3.2 g of NaCl?

6. What mass of CH

OH is needed to add to 1.20 kg of water to make a 3.00 m solution?

7. In order to make a 0.60 m solution, what mass of K

is needed to add to 400. mL of water?

8. 4.5 g of NH

Cl is added to 225 mL of water. What is the molality?

Answers: 1) 3.0 m 2) 2.0 m 3) 5.2 m

4) 286 g 5) 0.11 kg 6) 115 g 7) 51 g

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