Core Reactions: Acid-base
Slide 25 of 42
Sulfites
General forms of molecular equation:
–Metal sulfite (s or aq) + Acid (aq) ® Salt (aq) + H2SO2 (aq)   
–But, sulfurous acid is also unstable just like carbonic acid and will spontaneously dissociate.
– H2SO3 (aq) ® SO2 (g) + H2O (l)
–
–\ Metal sulfite (s or aq) + Acid (aq) ® Salt (aq) + SO2 (g) + H2O (l)
Similarly,
–Metal hydrogensulfite (s) + Acid (aq) ® Salt (aq) + H2SO3 (aq)   
–But, H2SO3 (aq) ® SO2 (g) + H2O (l)
–\ Metal hydrogensulfite (s or aq) + Acid (aq) ® Salt (aq) + SO2 (g) + H2O (l)
How would the full and net ionic equation look like?
How are they different if the salt is in solution as opposed to being in the solid state?
How do they vary when a weak acid is used?