Question

How many grams of NaCI per kilogram of water are present in a 2.7 molal aqueous solution​

Answer 1

157.79 g

Step-by-step explanation:

The definition of molality is:

• molality = moles of solute / kilogram of solvent

This means that in a 2.7 molal solution, there are 2.7 moles of NaCl per kilogram of water.

So now we convert those 2.7 moles of NaCl to grams, using its molar mass:

• 2.7 mol * 58.44 g/mol = 157.79 g