[RydbergConstant]

3)    What is the net ionic equation for the following “molecular” reaction:

      2 HNO2(aq) + Ba(OH)2(aq)  Ba(NO2)2(aq) + 2 H2O(l)

A)   2 HNO2(aq) + Ba(OH)2(aq) > Ba(NO2)2(aq) + 2 H2O(l)
B)   2 H+(aq) + 2 NO2(aq) + Ba(OH)2(aq) > Ba2+(aq) + 2NO2-(aq) + 2 H2O(l)
C)   2 H+(aq) + Ba(OH)2(aq) > Ba2+(aq) + 2 H2O(l)
D)   HNO2(aq) + OH-(aq) > NO2-(aq) + H2O(l)
E)   There is no reaction – all ions cancel out!

I've worked out this problem and got 2H+ + 2OH- > 2H2O, but the answer is D
I don't understand why don't you break up the HNO2(aq), isn't it a strong electrolyte?

[Borek]

HNO₂ is a weak acid, HNO₃ is considered strong.