SOLUTION: A 12% acid sol. Was mixd wth a 16% acid sol. To make 40L of a 15% acid sol. How much of the 12% and 16% acid solutions were used?

Question 559934: A 12% acid sol. Was mixd wth a 16% acid sol. To make 40L of a 15% acid sol. How much of the 12% and 16% acid solutions were used?
Answer by Maths68(1474) (Show Source): You can put this solution on YOUR website!
Solution A
Amount = x
Concentration =12% =0.12
Solution B
Amount = 40-x
Concentration =16% = 0.16
Resultant Solution
Amount =40
Concentration =15%=0.15
[Amount Solution A * Concentration A] + [Amount Solution B * Concentration of B] = Amount of Resultant * Concentration of resultant
(x)(0.12)+(40-x)(0.16)=(40)(0.15)
0.12x+6.4-0.16x=6
-0.04x+6.4=6
-0.04x=6-6.4
-0.04x=-0.4
-0.04x/-0.4=-0.4/-0.04
x=10

Amount = x = 10L
Concentration =12% =0.12
Solution B
Amount = 40-x =40-10=30L
Concentration =16% = 0.16
10L of 12% and 30L of 16% acid solutions were used to make 40L 15% Solution.

RELATED QUESTIONS
a 12 lit. solution in 33.33 %acid . how much water must be added to get the sol. having... (answered by mananth)

A chemist wishes to mix a solution that is 12% acid. She has on hand 10 liters of a 2%... (answered by ikleyn)

A Chemist has one solution that is 12% acid and another solution that is 24% acid. How... (answered by Alan3354)

how many liters each of 15% acid solution and 33% acid solution should be mixed to get... (answered by stanbon)

A chemist wants to make 700mL of a 6% acid solution by using 5% and 12% acid solutions.... (answered by josmiceli)

sol can paint a house in 9 hours while ding can paint the same house in 16 hours. after 4 (answered by josgarithmetic,dkppathak)

A chemistry teacher needs to strengthen a 12% solution of acid to strength s by mixing it (answered by jorel1380)

how much 20% acid must be mixed with 5% acid to make 30mL of 12%... (answered by josgarithmetic)

To make a 6% acid solution, a chemist mixes some 4% acid solution with 12 L of 10% acid... (answered by josgarithmetic,greenestamps)