What is the mass percent (m/m) concentration of a solution of 10.0 g of sodium chloride in 100 g of solution?

1 Answer
Jun 28, 2016

Answer:

#10%#

Explanation:

A solution's mass percent concentration, #"% m/m"#, is calculated by looking at how many grams of solute you get per #"100 g"# of solution.

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

Simply put, the solution's mass percent concentration is given by the number of parts of solute you get in #100# parts of solution, which is made up of solute and solvent.

So, if #"100 g"# of a given solution contains #"1 g"# of solute, that solution will have a #"1% m/m"# concentration.

In your case, the solution is said to contain #"10.0g"# of solute in #"100 g"# of solution, which means that its mass percent concentration will be

#"% m/m" = color(green)(|bar(ul(color(white)(a/a)color(black)(10 %)color(white)(a/a)|)))#

So, every time a problem wants you to figure out a solution's mass percent concentration, focus on determining how many grams of solute you per in #"100 g"# of solution.