
Which of the following anions act as weak bases in solution?
Br- NO2- CN- Cl- there can be more than one right answer.
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Answer
Basic anions – act as weak bases in water
– The anions (conjugate bases) of weak acids (F-,CN-, S2-, PO43- …) act as weak bases
Neutral anions – do not influence the pH
– The anions (conjugate bases) of strong acids (Cl-,Br-, I-, NO3-, ClO4-…) are extremely weak bases
(weaker than H2O) so they do not influence the pH
4) HCN and NaF won't. 5) NaBr and KBr won't. 7) NaCl and KCl won't A buffer is a answer of a mix of an acid and its conjugate base. Acetic acid and a sodium acetate. it is an invaluable technique mainain a relentless pH of a answer If acid is extra desirable the acdetate ion reacts with it annd remoces ir , I o=OH - is upload the acetic acid removes it. a million), 2) 3) 6) Will act asbuffers.
these are conjugate bases of the following acids HBr , HNO2 , HCN , HCl....
as we know that HCl and HBr are strong acids so their conjugate base will be very weak ...
so ans is Br- and Cl-
CN- and NO2- are conjugate bases of weak acids HCN and HNO2 ....so they are strong