why the weight of gold reduced drastically in aqua regia ?
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When gold is dipped in aqua regia the outer dull layer dissolves in aqua regia and the inner shiny layer appears. Due to this, some gold is lost during the polishing process. This causes thereduction in the weight.
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Answer:
The aqua-regia solution which contains concentrated nitric acid and concentrated hydrochloric acid in the ratio 1:3.
When the gold are dipped into this solution, considerable amount of gold was dissolved in it. Thus the weight of the bangle is reduced.
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