Question #a939a

Question

Question #a939a

1 Answer

Impact of this question

2161 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-05-20T20:59:30

$26% NaCl$ $"26% NaCl"$

Explanation:

The problem wants you to calculate the percent concentration by mass, $% m/m$ $"% m/m"$ , of sodium chloride in this solution.

The key thing to remember here is that a solution's percent concentration by mass tells you the mass of solute, which in your case is sodium chloride, present for every $100 g$ $"100 g"$ of solution.

After you dissolve the sodium chloride, the mass of the solution will be

$m_{solution} = 36 g + 100 g = 136 g$ $m_"solution" = "36 g" + "100 g" = "136 g"$

You know that you have $36 g$ $"36 g"$ of sodium chloride in $136 g$ $"136 g"$ , so use this as a conversion factor to find the mass of sodium chloride present in $100 g$ $"100 g"$ of solution

$100 color(red)(cancel(color(black)("g solution"))) * "36 g NaCl"/(136color(red)(cancel(color(black)("g solution")))) = "26.47 g NaCl"$

This means that the solution's percent concentration by mass is

$color(darkgreen)(ul(color(black)("% NaCl" = 26%)))$

The answer is rounded to two sig figs.

Science

Math

Humanities

... and beyond

Question #a939a

1 Answer

Explanation:

Related questions

Impact of this question