An impure sample of sodium chloride which weighed 1.2 gram gave on treatment with excess of silver nitrate solution 2.4 gram of silver chloride as the precipitate. Calculate the percentage purity of the sample.

Explanation

To solve the problem of calculating the percentage purity of the impure sodium chloride (NaCl) sample, we can follow these steps:

### Step 1: Write the chemical reaction
The reaction between sodium chloride and silver nitrate can be represented as:
\[ \text{NaCl} + \text{AgNO}_3 \rightarrow \text{AgCl} + \text{NaNO}_3 \]

### Step 2: Calculate the molar mass of AgCl
The molar mass of silver chloride (AgCl) is calculated as follows:
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