# A solution is made by dissolving 3.60g of sodium chloride to a final volume of 115mL solution. What is the weight/volume % of the solute?

##### 1 Answer

#### Explanation:

The idea here is that a solution's **mass by volume percent concentration**, *weight by volume*, tells you how many grams of solute you get **per** **of solution**.

#color(blue)(|bar(ul(color(white)(a/a)"% m/v" = "grams of solute"/"100 mL of solution" xx 100 color(white)(a/a)|)))#

This means that in order to determine a solution's mass by volume percent concentration, all you have to do is figure out how many grams of solute you have in

In your case, you know that you're dissolving

Right from the start, you can say that the solution's mass by volume percent concentration will be **lower** than **less** than

More specifically,

#100 color(red)(cancel(color(black)("mL solution"))) * "3.60 g NaCl"/(115color(red)(cancel(color(black)("mL solution")))) = "3.13 g NaCl"#

So, if

#color(green)(|bar(ul(color(white)(a/a)color(black)("% m/v " = " 3.13 %")color(white)(a/a)|)))#

The answer is rounded to three **sig figs**.