All of the chloride ion in 1.0 mol of MgCl2 is precipitated from aqueous solutions as AgCl.

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All of the chloride ion in 1.0 mol of MgCl2 is precipitated from aqueous solutions as AgCl.

[From: ] [author: ] [Date: 12-09-28] [Hit: ]

0.I am not sure how to work out this problem. It is on the practice quiz for my chem test next week.Thanks!From the equation, 1 mol MaCl2 will give 2 mol AgCl.......

The weight of pure, dry AgCl obtained is..

A. 12.6 g
B. 287 g
C. 139 g
D. 54.2 g
E. 0.77 g

I am not sure how to work out this problem. It is on the practice quiz for my chem test next week.
Thanks!

-

The balanced equation of chemical RXN:

MgCl2 (aq) + 2Ag+ (aq) --------------> Mg (2+)(aq) + 2AgCl (s)

From the equation, 1 mol MaCl2 will give 2 mol AgCl.

So, The weight of pure, dry AgCl = (2 mol AgCl)*(143.32 g AgCl / 1 mol AgCl)

= 286.64 g ~ 287 g

1

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