Acids, Bases and Salts — Prelims Questions

Which of the following statements is INCORRECT regarding the Brønsted-Lowry acid-base theory?

What is the pH of a $10^{-8},M$ $HCl$ solution at $25^circ C$?

A buffer solution is prepared by mixing $0.1,M$ $CH_3COOH$ and $0.1,M$ $CH_3COONa$. If the $pK_a$ of $CH_3COOH$ is 4.76, what is the pH of the buffer solution?

Which of the following salts will produce an acidic solution when dissolved in water?

If the $K_a$ for a weak acid $HA$ is $1.0 \times 10^{-5}$, what is the $K_b$ for its conjugate base $A^-$ at $25^circ C$?

Which of the following species can act as both a Brønsted-Lowry acid and a Brønsted-Lowry base (amphiprotic)?