50g water is evaporated from a 300g of 10%(w/w) aqueous solution of common salt . the concentration (w/w) of the resultant solution will be
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w) of the resultant solution will be
50g water is evaporated from a 300g of 10%(w/w) aqueous solution of common salt . the concentration (w/w) of the resultant solution will be
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Answer:
20%
Concept:
Calculation:
Given,
weight of the solution=300 gm
weight % = 10%
so, weight of the solvent = weight of solute / weight of solution
= [tex]\frac{10}{100}[/tex]×300
=30 gm
as given 50 gm of water is evaporated from the solution
so, remaining solution = 300-50
= 250 gm
The concentration of the resultant solution after the evaporation will be=
w/w%= weight of the solvent/weight of the remaining solution ×100
=( 50/250)×100%
= 20%
the concentration (w/w) of the resultant solution will be of 20%.
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