Suppose Kb value for HSO4- is 1 x 10^-9 what is the Ka value for H2SO4?
Correct answer: B. 1 x 10^-5
- A. 1 x 10^-9
- B. 1 x 10^-5
- C. 1 x 10^-3
- D. 1 x 10^-7
Explanation
To find the Ka for H2SO4, we use the relationship Ka × Kb = Kw, where Kw is the ion product of water, equal to 1 × 10-14. Given that Kb for HSO4- is 1 × 10-9, we can rearrange the equation to find Ka: Ka = Kw / Kb = 1 × 10-14 / 1 × 10-9 = 1 × 10-5. Therefore, the correct answer is Option B. Other options are incorrect because they do not satisfy this calculation.
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Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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