Find the molality of the solution if 42 grams of lithium chloride (LiCl) are dissolved in 3.6 kg of water.

0.275 m

11.7 m

0.990 m

0.857 m

Question

Eric Moody

Chemistry

9 January, 00:40

Find the molality of the solution if 42 grams of lithium chloride (LiCl) are dissolved in 3.6 kg of water.

0.275 m

11.7 m

0.990 m

0.857 m

+2

Answers (1)

Know the Answer?

Kadyn Taylor · Answer 1

The molality is calculated using the following rule:

molality = number of moles of solute / kg of solvent

From the periodic table:

molar mass of lithium = 6.941 gm

molar mass of chlorine = 35.453 gm

molar mass of LiCl = 6.941 + 35.453 = 42.394 gm

number of moles found in 42 gm = mass / molar mass = 42 / 42.394 = 0.99

molality = 0.99 / 3.6 = 0.275 m

Find the molality of the solution if 42 grams of lithium chloride (LiCl) are dissolved in 3.6 kg of water.0.275 m11.7 m0.990 m0.857 m

Find the molality of the solution if 42 grams of lithium chloride (LiCl) are dissolved in 3.6 kg of water.

0.275 m

11.7 m

0.990 m

0.857 m