how many kilograms of pure water is to be added to 100 kilograms of a 30% saline solution to make it a 10% saline solution
Mathematics
williams7919
Question
how many kilograms of pure water is to be added to 100 kilograms of a 30% saline solution to make it a 10% saline solution
1 Answer

1. User Answers sqdancefan
Answer:
200 kg
Stepbystep explanation:
If w is the amount of water added, then the concentration of the solution is ...
salt/solute = 100(0.30)/(100 +w) = 0.10
30 = 10 +0.10w . . . . . simplify
20 = 0.10w . . . . . . . . subtract 10
20/0.10 = w = 200 . . . . divide by 0.10
200 kg of water must be added to dilute the solution to 10%.