30 ml of 0.06 M solution of the protonated form of an anion of acid methonine `(H_2A^(+))` is treated with 0.09 M NaOH. Calculate pH after addition of

Question

30 ml of 0.06 M solution of the protonated form of an anion of acid methonine `(H_2A^(+))` is treated with 0.09 M NaOH. Calculate pH after addition of

30 ml of 0.06 M solution of the protonated form of an anion of acid methonine `(H_2A^(+))` is treated with 0.09 M NaOH. Calculate pH after addition of 20 ml of base `pKa_1=2.28 and pKa_2=9.2`
A. 5.5
B. 5.74
C. 9.5
D. None

Monjur Alahi

6 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=(pK_(a_1)+pK_(a_2))/2 =(2.28+9.2)/2=5.74`

6 views Answered 2023-02-05 15:29