If you need to make a 5.6% solution of #NaCl# using 9.6g of #NaCl#, how many grams of water is needed?

1 Answer
Apr 27, 2016

Answer:

#161.8*g# of water is required.

Explanation:

#"Mass of sodium chloride"/"Mass of solution"xx100% = 5.6%#

So #(9.6*g)/"Mass of solution"= 0.056#

So #(9.6*g)/(0.056) ="Mass of solution"= 171.4*g#

Of course the mass of solution includes the #9.6*g# mass of sodium chloride. So we require #171.4*g-9,6*g" of water"# #=# #161.8*g#