one day Rita went to a jewellery shop with her mother .her mother gave an old gold jewellery to the goldsmith to polish. next day when they brought the jewellery back, they found that there was a slight loss in its weight. can you suggest a reason for the loss in weight ?
Answers
Answer:
To polish a gold ornament
it is dipped in a liquid called aqua regia (a mixture of hydrochloric acid and nitric acid) on getting the environment of the aqua regia the outer layer of gold is dissolved and the inner shiny layer appears the dissolving of the layer causes a reduction of weight of the jewellery. hope it will help you Follow me!!
Loss of a layer of jewellery leads to loss of weight.
Explanation:
When the gold ornaments are polished it is put into a solution known as aqua regia. This solution is a mixture of two solution which helps in providing shine to the jewellery.
The solution of aqua regia is a mixture of hydrochloric acid and nitric acid. The outer layer of the gold dissolves in the solution and the shiny layer inside is visible.
This is the reason the weight of the jewellery is decreased a bit after being polished by the goldsmith.
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