Which of the following relation(s) is/are true for alkaline solution? — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

In any aqueous alkaline (basic) solution at any temperature: 1. The concentration of OH- is greater than H+: [OH-] > [H+]. This directly implies pOH < pH, or pH > pOH. Therefore, option (b) is true and option (d) is false. 2. In neutral water, [H+] = [OH-] = sqrt(Kw), so pH = pOH = pKw / 2. In basic solution, [H+] < sqrt(Kw) => pH > pKw / 2. Therefore, option (a) is true. 3. Similarly, [OH-] > sqrt(Kw) => pOH < pKw / 2. Therefore, option (c) is true.