What happens when?
Gold is treated with aqua-regia.

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Solution

When gold is treated with aqua-regia.

$[H N O_{3} + 3 H C l \to N O C l + 2 H_{2} O + 2 C l] \times 3$
$[A u + 3 C l \to A u C l_{3}] \times 2$
$[A u C l_{3} + H C l \to H A u C l_{4}] \times 2$
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$2 A u + 3 H N O_{3} + 11 H C l \to 2 H A u C l_{4} + 3 N O C l + 6 H_{2} O$
The overall reaction is as shown.

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Similar questions

(i) What is aqua-regia?
(ii) State the use of aqua-regia.
(iii) What is the function of HCl in preparation of aqua-regia?

what will happen if acids are not in aqua regia

H g C l_{2}

H g C l_{2}

(i)What is aqua regia?

(ii)Give any two uses of aqua regia.

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