[nikita]

Please bear with me, as these questions may either seem obvious or may not even make sense, but ill try to be as clear as i can be, with the limited knowledge i have.

I fairly understand ionic equations and i understand net ionic equations, but its all really only on the surface.  i hate not knowing why something is going on or the how of it.

for example, i understand that an ionic equation is splitting everything up into their ions.  eg., HCl into H⁺ and Cl^-.  I understand (on the easy ones) that all these ions will either dissolve into solution, if they are soluble, become a water and a salt, or precipitate.  i guess there are other times, when nothing happen, eg., no reaction.  im a little hazy on that, but whatever.  here is an example of something i understand:
K⁺(aq) + I^-(aq) + Pb²⁺(aq) + 2 NO₃^-(aq)    KNO₃ +PbI₂
( i wont do it here, because its hard to and confusing anyway, but the spectators are K and NO3 on each side so the net ionic is
Pb2+ (aq) + I-(aq)  PbI₂(s)   due to the insolubility lead iodide.

so, something like this confuses me:
K⁺ (aq) + HSO_4^-(aq) + Na⁺(aq) + OH^-(aq) ? 
I would do KOH + NaHSO₄ and call it a day.  however, i would only do this because of the charges.  i have read chapter 4 of my book about 7 times and i still cant see or comprehend what i am missing.  KOH is a strong base.  I presume NaHSO₄ is some kind of salt, sodium bicarbonate,  but this is not the final answer.  why?  what fundamental thing am i missing? The answer in my book tells me nothing, just the nie:  HSO₄+OH H₂O + SO₄. (is this something i should memorise?  i think that HSO4 ionises twice, but i dont have a list of ions that do that, just a random example.) 

I guess a main question i have is, i understand when a strong acid and a strong base combine in water, they produce a water and a salt.  i also understand insolubility and precipitates.  but i dont know anything else.  if they are not those 2 things, then how do i find out or learn how to find out what they are, eg., predict the reaction.  I have the same problems with weak bases and strong acids and weak acids and strong bases.  what on earth do i do with those?  there are only a few examples in my book concerning NH₃.  what about something like, (CH₃)₂NH?  the ionisation?  do i add H2O on and hope for the best?  eg., (CH₃)₂NH₃+OH?  my issue is i dont understand why.

Sorry this is long and may sound ridiculous. 

i hope this makes sense and someone who has chemistry knowledge understands what i am talking about. 

[Borek]

H₂SO₄ = H⁺ + HSO₄^-

HSO₄^- = H⁺ + SO₄^2-

KHSO₄ is a so called acidic salt. HSO₄^- is a relatively weak acid (still strong when compared with most weak acids, bu much weaker than H₂SO₄). When going for net ionic I would write something like

HSO₄^- + OH^- = SO₄^2- + H₂O

HTH