Which of the following aqueous solutions is(are) considered basic ?
I. [H₃O⁺] = 5.4×10^{- 8} M
II. pOH = 9.0
III. [OH^-] = 4.3×10^{- 4}

Question

Which of the following aqueous solutions is(are) considered basic ? I. [H₃O⁺] = 5.4×10^{- 8} M II. pOH = 9.0 III. [OH^-] = 4.3×10^{- 4}

Quizplus · Accepted Answer

I. A solution is basic if its pH > 7. Given the concentration of OH- ions ([OH-] = 5.4×10^-8 M), this is actually indicative of an acidic solution because a higher concentration of H+ ions is implied (pH < 7).II. pOH = 9.0 implies a pH of 5 (since pH + pOH = 14), which is acidic.III. [OH-] = 4.3×10^-4 M indicates a basic solution because the concentration of OH- ions is higher than 1×10^-7 M, which is the neutral concentration of OH- ions in water at 25°C.

Which of the Following Aqueous Solutions Is(are) Considered Basic