There are two different solutions, A and B. The pH of solution A is 4. Find the pH of solution B having $[\text{H}^+]$ three times that of solution A.

Calculate the pH of buffer solution containing 0.1M $\text{CH}_3\text{COOH}$ and 0.1 M $\text{CH}_3\text{COONa}$ $[K_a = 1.8 \times 10^{-5}]$

What is the pH of 1 molar HCl solution? (assume complete dissociation)

What is the oxidation state of Xe in $\text{XeOF}_4$?