pH of the following solution is not affected by dilution

Question

pH of the following solution is not affected by dilution

pH of the following solution is not affected by dilution
A. 0.01M `NaHCO_(3)^(-)`
B. 0.01 M `NaH_(2)PO_(4)`
C. 0.01 M `CH_(3)COONH_(4)`
D. All of these

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

Correct Answer - D
Aqueous solution of a salt of a weak acid and a weak base acts as a buffer solution. The pH of a buffer does not change on dilution. Thus , pH of 0.01 M `CH_(3)COONH_(4)` will not change on dilution. `HCO_(3)^(-)` ( from `NaHCO_(3)` and `H_(2)PO_(4)^(-)` ( from `NaH_(2)PO_(4))` are amphiprotic anions. The pH of solution containing amphiprotic anions do not change on dilution. Thus, all the three choices A,B and C are correct.