List of top Chemistry Questions on Buffer Solutions asked in IPU CET

A buffer is formed by adding 500 ml of 0.20 M correct to 500 mL of 0.10 M NaC H$_2$O$_2$. What would be the maximum amount of HCl that could be added to this solution without exceeding the capacity of the buffer?
The acid dissociation constant for \( HC_6H_7O_6 \) is \( 8.0 \times 10^{-5} \). If a solution contains equal concentrations of \( HC_6H_7O_6 \) and \( C_6H_7O_6^- \), what will be the pH of the solution?