Write the balanced equations for the reaction occuring when gold is dissolved in aqua regia.

Explanation

To write the balanced equations for the reaction occurring when gold is dissolved in aqua regia, we can follow these steps:

### Step 1: Understand the Components of Aqua Regia
Aqua regia is a mixture of concentrated nitric acid (HNO3) and concentrated hydrochloric acid (HCl) in a ratio of 1:3. This mixture generates nascent chlorine, which is essential for dissolving gold.

### Step 2: Write the Initial Reaction
When aqua regia is prepared, the nitric acid reacts with hydrochloric acid to produce nitrosyl chloride (NOCl) and water (H2O). The reaction can be represented as:
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