Gold is frequently purified by electroplating. Typically the gold is dissolved in a cyanide solution (which is fairly selective for gold) and then it is pulled out of solution by electroplating. If the electroplating apparatus used a current of 3.5 amperes, then how long will it take (h) to purify one ounce of gold from a gold(III) cyanide solution?
Gold is frequently purified by electroplating. Typically the gold is dissolved in a cyanide solution (which is fairly selective for gold) and then it is pulled out of solution by electroplating. If the electroplating apparatus used a current of 3.5 amperes, then how long will it take (h) to purify one ounce of gold from a gold(III) cyanide solution? (
You conduct an experiment where you use a single battery with a charge capacity of 900 mAh to precipitate an unknown metal from a salt solution that was leaking from an old battery. You use a vast excess of the salt, so the amount of metal condensed is limited by the battery. You obtain 3.368 g of the metal. You can assume that the metal was the only substance being reduced in the
You conduct another experiment on silver condensation. You add 8.0 g of silver nitrate to 200 mL of pure water. You attach a single 850 mAh AAA battery (at 1.3 V) to the electrochemical cell. You can assume that the entire battery charge is usable for electroplating. You get 3.24 g of silver metal at the end of the experiment.
a) Was your silver recovery limited by the battery capacity or the available silver in solution?
b) What was your product yield (%) using the limiting resource?
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