Problema Solution
A nurse wants to add water to 14 ounces of a 10% solution of benzalkonium chloride to dilute it to an 8% solution. How much water must she add? (Hint: Water is 0% benzalkonium chloride.
oz=?
Answer provided by our tutors
Let nurse add x ounces of water.
So, 14*0.1+x*0.00=(14+x)(0.08)
1.4+0=1.12+0.08x
0.08x=1.4-1.12
0.08x=0.28
x=0.28/0.08
x=3.5
Nurse need to add 3.5 ounces of water to dilute 8% solution.