The `PK_(a)` of a weak acid is `5.85.` The concentrations of the acid and its conjugate base are equal at a pH of -

Question

The `PK_(a)` of a weak acid is `5.85.` The concentrations of the acid and its conjugate base are equal at a pH of -

The `PK_(a)` of a weak acid is `5.85.` The concentrations of the acid and its conjugate base are equal at a pH of -
A. `6.85`
B. `5.85`
C. `4.85`
D. `7.85`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
`"pH=pKa+log"("[Conjugate base]")/("[Acid]")`
`because` [Conjugate base] = [Acid]
pH = pKa = 5.85

4 views Answered 2023-02-05 15:29