One day Rita went to a jewellery shopwith her mother. Her mother gave and old jewellery to the goldsmith to polish.Next day when they bought the jewellery back they found that there was a slight loss in its weight . Can you guess the reason for the loss in weight?
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Yes... The goldsmith dips the jewellery in aqua regia which would dissolve some amount of gold in it...
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1
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The gold jewellery is dipped into an acidic solution called aqua regia (a mixture of hydrochloric acid and nitric acid) for polishing. On dipping the gold jewellery in the acid solution, the outer layer of gold dissolves and the inner shiny layer appears. This causes a slight loss in its weight.
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