Respuesta :

Answer:

w/w means weight/weight

Therefore, in a 250 g of solution, 5% needs to be KCl,  

i.e. 5% x 250 = 12.5 g of KCl is needed.

The masses of KCl and H2O are needed to make 250 g of 5.00 % solution is 12.5 g of KCl and 237.50 g of H2O.

Calculation of the masses:

Since there is the solution of 250 g of 5.00 % solution

So, here

Mass of KCl is = 5% of 250 = 12.5 g

And, the mass of H2O is

= 250 - 12.5g

= 237.50 g

Hence, The masses of KCl and H2O are needed to make 250 g of 5.00 % solution is 12.5 g of KCl and 237.50 g of H2O.

Learn more about mass here: https://brainly.com/question/18470727.

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