Question on Quiz#4 problem 9

by Kat
(Sacramento)

You have been asked to dilute and repackage 1 Liter of a 20% solution into 1 pint bottles of 5% solution. How many bottles will you be able to fill?

Can you explain how I start? I don't understand.

reply: (Keith) This question is very similar to the one shown
on this page. The easiest way to do these is using the Algebra shortcut:

(C1)(V1) = (C2)(V2)


(.20)(1000ml) = (.05)(X)


200    =    .05X

___           ____

.05             .05


4000        =        X




4000ML ÷ 480Ml (1 pint) = 8.33


So, you could fill 8 bottles.