Question

Which of the following sentences is true for a basic solution?

• A. For basic solution, \([\text{H}_3\text{O}^+] = [\text{OH}^-]\)
• B. In basic solution, the excess of \(\text{OH}^-\) ions are present.
• C. In the basic solution, there is excess of \(\text{H}_3\text{O}^+\) ions.
• D. The pOH of a basic solution can be calculated by pOH = \(-log[\text{H}^+]\)

Hint:

A basic solution has more hydroxide ions than hydronium ions.

Answer 1

The Correct Option is B

Step 1: Recall the rule.
Compare the two ion concentrations. Acid: $[\text{H}_3\text{O}^+] > [\text{OH}^-]$. Neutral: equal. Base: $[\text{OH}^-] > [\text{H}_3\text{O}^+]$.

Step 2: Apply to the options.
(A) equal concentrations means neutral, not basic. (C) excess hydronium means acidic. (D) uses the pH formula and calls it pOH, which is an error. (B) states excess hydroxide ions, which fits a base.

Final Answer:
Option (B) is the true statement. \[ \boxed{\text{(B)}} \]