Quantitative Data Mass of silver alloy 04958 g Mass of Gooch cruciblefilter

# Quantitative data mass of silver alloy 04958 g mass

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Quantitative Data Mass of silver alloy 0.4958 g Mass of Gooch crucible/filter paper 16.8753 g Mass of Gooch crucible/filter paper/AgCl precipitate 17.2562 g
Analysis A1 Balanced chemical reactions that were part of the process. Reaction of copper with nitric acid, and silver with nitric acid (see P2 above). Cu + HNO 3 Cu(NO 3 ) 2 + H 2 O + NO 2 Ag + HNO 3 AgNO 3 + H 2 O + NO 2 Reaction of silver ions (alloy solution) with chloride ions (NaCl solution) (See P3 above). Ag + (aq) + Cl - (aq) AgCl(s) A2 Determine the number of grams of sodium chloride needed to precipitate the silver ions. (Assuming the entire mass of the alloy is silver for this calculation). 1 molCl ¿ × 58.44 g NaCl 1 mol NaCl = 0.2686 gNaCl 1 mol Ag + ¿ × 1 mol NaCl ¿ 1 mol Cl ¿ ¿ 1 mol Ag + ¿ 1 mol Ag × ¿ 0.4958 g Ag× 1 mol Ag 107.87 g Ag × ¿ This amount times two will ensure silver ions are the limiting reactant in an excess of chloride ions. ( 0.5372 g NaCl) A3 Determine the number of grams of AgCl precipitate. Mass of Gooch crucible/filter paper/AgCl precipitate 17.2562 g - Mass of Gooch crucible/filter paper - 16.8753 g = Mass of AgCl precipitate = 0.3809 g A4 Determine the number grams of silver metal present from the mass of the AgCl precipitate. 1 mol Ag + ¿ × 107.87 g Ag 1 mol Ag = 0.2867 g Ag 1 mol Ag + ¿ 1 mol AgCl × 1 mol Ag ¿ 0.3809 g AgCl× 1 mol Ag 143.32 g AgCl × ¿ A5 Determine the percentage silver in the alloy.

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• Spring '11
• BOB
• Alloy, Sodium chloride, mol Ag, g Ag, crucible/filter paper/AgCl precipitate