A mixture of sodium chloride and sodium iodide when treated with sulphuric acid gave sodium sulphate equal to the weight of the original mixture. Find the percentage composition of the mixture.

Explanation

To solve the problem of finding the percentage composition of a mixture of sodium chloride (NaCl) and sodium iodide (NaI) that produces sodium sulfate (Na2SO4) when treated with sulfuric acid, we can follow these steps:

### Step 1: Write the Reactions
The reactions that occur when NaCl and NaI react with sulfuric acid (H2SO4) are as follows:

1. For sodium iodide:
\[
2 \text{NaI} + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + 2 \text{HI}
...