Question

How many grams of solute are present in `"2500 g"` of a sodium hypochlorite solution that is `"5.24% m/m"` ?

Answer 1

`"130 g"`

Explanation:

The solution's percent concentration by mass, `"m/m%"`, tells you the number of grams of sodium hypochlorite, your solute, present in `"100 g"` of solution.

In your case, you know that you have

`color(blue)(5.24color(red)(%))"m/m NaClO " -> " "color(blue)("5.24 g")color(white)(.)"NaClO for every"color(white)(.)color(red)("100 g of solution")`

This means that `"2500 g"` of solution will contain

`2500 color(red)(cancel(color(black)("g solution"))) * "5.24 g NaClO"/(100color(red)(cancel(color(black)("g solution")))) = color(darkgreen)(ul(color(black)("130 g NaClO")))`

The answer must be rounded to two sig figs, the number of sig figs you have for the mass of the solution.