Question

the solubility of KCL is 40 gram in hundred gram in water the density of solution is 1.4 gram /litres what is the w/v percentage of KCL is the solution​

Answer 1

Answer:

40% is the correct answer.

Explanation:

The solubility of KCL = 40 gram

density of solution = 1.4 gram /litres

To find :

w/v percentage of KCL is the solution​

Solution:

We know that, to calculate density

Den = mass / volume

Mass = 100+40 = 140

V is volume

density=(40+100)/v = 1.4

140=1.4v

v=140/1.4

v= 100

We know that

w/v%=mass of KCl in 100 ml of solution.

140/1.4 ml contains 40 g of KCl.

100 ml will contain (100 x 40x 1.4/140 )=

=40%

Hence,

40% is the correct answer.