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  • 22-11-2017
  • Chemistry
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A solution contains 1.77g of dissolved silver. What mass of potassium chloride must be added to completely precipitate all of the silver?

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W0lf93
W0lf93 W0lf93
  • 01-12-2017
Ag++Clâ’→AgCl(s)âŹâ†“ We need to add over 1 g KCl. Moles of silver in solution = 1.77â‹…g107.87â‹…gâ‹…molâ’1` = 0.0164â‹…mol Clearly we need an equivalent quantity of chloride, thus we add a mass of potassium chloride = 0.0164â‹…molĂ—74.55â‹…gâ‹…molâ’1 = ??â‹…g The 1 equiv will precipitate most of the silver ion. Silver chloride will possess some aqueous solubility. The result is a curdy white precipitate of silver chloride.
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