posted by sam on .
A silver-copper alloy had a mass of 0.1264g. When the alloy was dissolved in nitric acid and the silver precipitated as silver chloride, the precipitate had a mass of 0.1375g. Calculate the percent of silver in the alloy. Show your calculations.
AgCl had a mass of 0.1375 g. Change that to mols. mols = g/molar mass AgCl.
Convert mols AgCl to mols Ag. That is 1:1.
convert mols Ag to grams. grams = mols x molar mass Ag.
%Ag = [mass Ag/mass sample]*100
mass sample = 0.1284 g.
Post your work if you gt stuck.