Question

How many ounces of pure water must be added to 50 oz of a 15% saline solution to make a saline solution that is 10% salt?

Answer 1

How's that ?

Answer 2

@alivejeremy http://prnt.sc/bbibl0
10% is 2/3 of 15%.
So add water to 50 mL to make it 2/3 of the total volume, i.e. 75 mL total.
OR, us c1v1=c2v2.
C1=15%
V1=50 mL
C2=10%
V2=?
15%*50mL=10%*V2 mL
V2=50 mL * 15/10 = 75 mL.
Calculate how much water should be added.

Answer 3

Mathboy -.-

Answer 4

Thnx alot guys you r all amazing mathematicians.