Answer
$75$ mL
Work Step by Step
Let $x$ be the amount of pure acid, then our equation is: $x+300\cdot0.5=0.6(300+x)\\x+150=180+0.6x\\0.4x=30\\x=75$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter P, Prerequisites - Section P.9 - Modeling with Equations - P.9 Exercises - Page 72: 48
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