A solution contains a mixture of sodium carbonate and sodium hydrogen carbonate. Titrate 25 cm³ of this solution with 0.1 M HCl. Using phenolphthalein and methyl orange indicators, determine the amoun

I will solve question 37, parts (a), (b), and (c).

First, let's establish the reactions and volumes from the titration:
The solution contains a mixture of sodium carbonate ($\text{Na}_2\text{CO}_3$) and sodium hydrogen carbonate ($\text{NaHCO}_3$).
Total volume of the mixture solution = $500 \text{ ml}$.
Volume of the mixture solution used for titration = $25 \text{ cm}^3$.
Molarity of $\text{HCl}$ = $0.1 \text{ M}$.

Titration 1 (Phenolphthalein indicator):
This indicator changes color when $\text{Na}_2\text{CO}_3$ is converted to $\text{