SOLUTION: What quantity of 75 per cent acid solution must be mixed with a 20 per cent solution to produce 440 mL of a 50 per cent solution?

Algebra.Com
Question 892649: What quantity of 75 per cent acid solution must be mixed with a 20 per cent solution to produce 440 mL of a 50 per cent solution?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
The exercise problem is this kind of situation:

Mixing two concentrations for known amount of mixture - http://www.algebra.com/tutors/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev
A general solution derivation is included in the lesson.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

What quantity of 75 per cent acid solution must be mixed with a 20 per cent solution to produce 440 mL of a 50 per cent solution?


Let amount of 75% solution to be mixed, be S

Then amount of 20% solution is: 440 – S

Thus, we have: .75(S) + .2(440 – S) = .5(440)

.75S + 88 - .2S = 220

.75S - .2S = 220 – 88

.55S = 132

S, or amount of 75% solution to be mixed = , or  mL

You can do the check!! 



If you need a complete and detailed solution, let me know!!



Send comments, “thank-yous,” and inquiries to “D” at MathMadEzy@aol.com.

Further help is available, online or in-person, for a fee, obviously. 



For FREE info and answers to questions about the ASVAB exam, the NYS 3 – 8 city/state wide exams,GENERAL

MATH and HOMEWORK QUESTIONS, or MATH QUESTIONS related to the Regents Integrated Algebra, 

Regents Geometry, Regents Algebra 2/Trigonometry, SHSAT, COOP/HSPT/TACHS, PSAT, SAT, ACT, SSAT/ISEE,

GRE, CLEP, and the TASC/GED, you can visit: http://asvabstudyzone.freeforums.net/. 

RELATED QUESTIONS


What quantity of 75 per cent acid solution must be mixed with a 30 per cent solution to... (answered by stanbon)

What quantity of 75 per cent acid solution must be mixed with a 25 per cent solution to... (answered by josmiceli)

What quantity of 75 per cent acid solution must be mixed with a 25 solution to produce... (answered by rfer)

What quantity of 75 per cent acid solution must be mixed with a 30 percent solution to... (answered by checkley77)

What quantity of 65 per cent acid solution must be mixed with a 25 per cent solution to... (answered by ankor@dixie-net.com)

What quantity of 60 per cent acid solution must be mixed with a 30 per cent solution to... (answered by modi.kk91)

What quantity of 70 per cent acid solution must be mixed with a 20 percent solution to... (answered by checkley77)

What quantity of 60 per cent acid solution must be mixed with a 20 percent solution to... (answered by jrfrunner)

What quantity of 60 per cent acid solution must be mixed with a 25 percent solution to... (answered by Alan3354)