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Posted by on Monday, August 27, 2007 at 9:17pm.

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.

  • AP Chem - , Monday, August 27, 2007 at 9:49pm

    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.

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