Chemistry - Redox Reactions Question with Solution | TestHub

To determine the amount of ${\mathrm{NH}}_3$ gas dissolved in water, produced during the combustion process, a $10.00{\mathrm{cm}}^3$ sample of the aqueous solution was withdrawn from the reaction vessel and added to $15.0{\mathrm{cm}}^3$ of a ${\mathrm{H}}_2{\mathrm{SO}}_4$ solution $\left(\mathrm{c}=0.0100{\mathrm{moldm}}^{-3}\right)$. The resulting solution was titrated with a standard NaOH solution $\left(\mathrm{c}=0.0200{\mathrm{moldm}}^{-3}\right)$ and the equivalence point was reached at $10.64{\mathrm{cm}}^3$.

The $K_b$ for NH₃ is $1.8\times 10^{-5}$. Given $\log 2=0.3$, $\log 3=0.48$, and $\log 436=2.64$,

calculate the pH of the solution in the container after combustion.