Question

molality of 100g of 20%(w/w) of aqueous Common salt solution is approximately

Answer 1

Molality: Molal concentration is the measurement of the degree of concentration of a solute in a solution. Molal concentration is also called molality.

Given:

Aqueous common salt solution

Mass = 100 g

20 % ( w /w )

Formula:

Molality =  ( Mass / Molar mass ) / mass of solvent

Here

Mass of the common salt = 20 / 100 * 100

Hence,

Mass of the common salt = 20 g

To calculate molar mass,

Molar mass of ( Common salt ) =  40 g / mol

Hence,  

Substituting,

Molality = ( ( 20 / 40 ) * 1000 ) / 100  

0.5 * 10  

Molality = 5 m

Read more on Brainly.in - https://brainly.in/question/4073731

Answer 2

Answer:

4.27 m.

Explanation: