Question 882575
"Pure acid", means that it is 100%.  A good prediction for how much of each acid concentration to use can be based on this lesson, in which the problem-solving method and symbolic form result is shown:


<a href="http://www.algebra.com/tutors/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev">Mixing two concentrations for known amount of mixture</a>