10 g of a mixture of `NaHC_2O_4` and `Na_2C_2O_4` on heating gave `6.12 g` of `Na_2CO_3`. Another 10 g of the mixture was dissolved in 1.0 L of solution. 25" mL of " this solution was titrated with 0.1 N NaOH. Find the volume of NaOH required.

Explanation

To solve the problem step by step, we will follow the outlined procedure:

### Step 1: Determine the composition of the mixture
Let \( x \) be the mass of \( \text{NaHC}_2\text{O}_4 \) in the 10 g mixture. Therefore, the mass of \( \text{Na}_2\text{C}_2\text{O}_4 \) will be \( 10 - x \) g.

### Step 2: Write the reactions
The reactions that occur upon heating are:
1. \( \text{NaHC}_2\text{O}_4 \rightarrow \text{Na}_2\text{CO}_3 + \text{by-products} \)
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