Problema Solution
Alyssa is a chemist with Gemco Pharmaceutical Company. She needs to prepare 12 ounces of 9% hydrochloric acid solution. The only solutions she currently has available are 4% and 12% hydrochloric acid. How much should she use of each solution to obtain the needed solution?
Answer provided by our tutors
0.09*12 = x*0.04 + (12-x)*0.12
x= 4.5 ounces.
so, 4% = 4.5 ounces or 9/2 ounces.
and 12% = 7.5 ounces or 15/2 ounces