What is the concentration in m/m% of a solution prepared from 50.0 g NaCl and 150.0 g of water?
1 Answer
Explanation:
A solution's mass by mass percent concentration,
Your solution contains two substances: sodium chloride,
#"mass solution = 50.0 g + 150.0 g"#
#"mass solution = 200.0 g"#
Now, this solution contains
#"200.0 g" = color(red)(2) * "100.0 g"#
of solution. This means that
#"50.0 g"/color(red)(2) = "25.0 g"#
of solute. Since this represents the amount of solute present in
#color(darkgreen)(ul(color(black)("m/m% = 25.0% NaCl")))#
The answer is rounded to three sig figs.