Question

You are working as a clinical chemist in charge of testing of the blood samples. you are required to fix a sodium chloride solution with water in the ratio of 2:3 .
a) starting with 580ml of the sodium chloride solution, how much water needs to be added?

B) Give your answer in standard form to the appropriate number of significant figures

Answer 1

$\bf \cfrac{sodium~chloride}{water}\qquad 2:3\qquad \cfrac{2}{3}\implies \cfrac{2\cdot \frac{580}{2+3}}{3\cdot \frac{580}{2+3}}\implies \cfrac{2\cdot 116}{3\cdot 116}\implies \cfrac{232}{348}$