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Answer to Question #56024 in Inorganic Chemistry for Chaloni

Question #56024
A procedure similar to that described in this experiment can be used to precipitate Cl- as AgCl. A sample containing chloride weighing 0.207 g was precipitated with Ag+, and the AgCl produced weighed 0.472 g. Calculate the mass % of Cl- in the original sample.
Expert's answer
Ag+ + Cl- = AgCl
n(Cl) = n(AgCl) = m(AgCl)/MW(AgCl);
m(Cl) = nCl AW(Cl);
w(Cl) = m(Cl/msample) = (m(AgCl) AW(Cl))/(msample MW(AgCl))
w(Cl) = (0.472 g 35.45 g mol-1)/(0.207 g 143.3182 g mol-1) = 56.4 %

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