Homework Help: Chemistry

Posted by Lori on Friday, February 8, 2008 at 1:48pm.

Did I do this correctly or do I need to try again?

What is the mass percent of a solution when 18.6 g of table salt is added to 81.4 g of water?

Mass Percent = mass of solute(g)x100

mass of solution (g)
= 18.6 g x100
18.6 g + 81.4g

= 18.6 g x 100
100g

= 0.186 x 100
= 18.6
The mass percent of the solution is 18.6%

Chemistry - drbob222, Friday, February 8, 2008 at 3:39pm
You number is correct; if you obtained it correctly from your work I can't tell.

mass percent = (mass solute/100 g solution)*100

[(18.6)/(18.6 + 81.4)]*100 =
(18.6/100)*100 = 18.6%

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