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April 25, 2015

Homework Help: Chemistry Who step by step

Posted by Ken on Sunday, May 11, 2014 at 6:29pm.

A 0.8870g sample of a mixture of nacl and nan03 is dissolved in water, and the solution is then treated with an excess of AGN03 to yield 1.913g of agcl. Calculate the percent by mass of the nacl in the mixture.

1.913g / 143 = 0.0133
x/58 ( 0.8870g -x) y/85 = 0.0133
0.01529 - 0.01724x + 0.01176x = 0.0133
x= 0.00199/0.00548
= 0.363/0.8870g x 100
=41%
100g - 41g = 59g

The right answer 87.87%

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