pKa CH3COOH is 4.74. The pkb value of CH3COO- ions will be
Correct answer: B. 9.26
- A. 7
- B. 9.26
- C. 14
- D. zero
Explanation
The relationship between pKa and pKb of a conjugate acid-base pair is governed by the equation:pKa + pKb = 14Reasoning:CH3COOH is a weak acid that dissociates in water to produce CH3COO⁻ and H⁺ ions:CH3COOH ⇌ CH3COO⁻ + H⁺We are given the pKa value of CH3COOH, which is 4.74.Now, we can use the equation mentioned above to find the pKb of CH3COO⁻:pKb = 14 - pKa = 14 - 4.74 = 9.26Therefore, the pKb value of CH3COO⁻ is 9.26.
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