HELP: What is the concentration of the original chloride solution?

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Posted on : 13-07-2013 | By : My Study Coach | In : Improve Your Concentration
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A solution contains chloride ions. A chemist measures the concentration of chloride ions by adding a large amount of a silver nitrate solution to 100 ml of the chloride solution. A precipitate is formed which, after filtering, washing and drying, is found to weigh 50 g. What is the concentration of the original chloride solution?

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Comments (1)

molar mass of the AgCl2 = 178.768g/mol
and there is 50g of the AgCl2.. to get the mole we divide 50g/178.768g/mol=0.296mols

but the concentration of the 2 mols of Cl is going to be in mols/l

so first we say 2X0.296=0.559mols

concentration of the origical chloride solution =0.559mol/0.1L=5.59M……I CONVERTED THE 100ML TO 0.1L

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