1ya ans is NaHCO3 and NaOH,as the former is an acid salt and the latter is a base.
The pair of compounds which cannot exist together in solution is-
(A) NaHCO3 and NaOH (B) NaHCO3 and H2O
(C) NaHCO3 and Na2CO3 (D) Na2CO3 and NaOH
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11 Answers
1
1it is not an acid salt it is a basic salt
reason :it is formed from strong base NaOH and weak mineral acid H2CO3
11No one can claim that NaHCO3 is an acid salt because of the H in the formula. In order to be
an acid salt it must produce or cause the production of an ionisable H+ . NaHCO3 does not
do this. The reaction equation of NaHCO3 in water is:
NaHCO3 + H2O → Na+ OH- + H2CO3.
The H2CO3 is unstable and breaks down to CO2 and H2O
The basicity of the solution comes from the OH- ions produced.
11Sodium bicarbonate is an amphoteric compound
I got this information from wiki.
11khyati is right ...NaHCO3 is amphoteric salt
it is formed as a result of partial nuetralisation of salt Na2CO3
Na2CO3 + HCl → NaHCO3 + NaCl
it can act as both acid and base in a solution and whether it will act as acid or base depends on the other reactant (with which it is being reacted)
if the other reactant is significantly basic(like NaOH in the above question) it will act as an acid
if the other reactant is acidic(like HCl/H2SO4) then it will act as a base
I have seen this question in many books ..in most of them the reason given is that NaHCO3 is a acid salt but it is given in accordence with the question because in the reaction given in the question it is acting as an acid salt..but actually it is amphoteric salt
