This is a neutralization reaction and also a double displacement reaction. Therefore, we can predict the products by writing each of our reactants out as the constituent ions that exist when they dissociate in aqueous solution and then switching the anion and cation partners:
H2SO4 dissociates into H+ and SO42-
KOH dissociates into K+ and OH-
When the cations and ions in solution switch partners, H+ joins with OH- to form water (H2O), and K+ joins with SO42- to for K2SO4.
So all together, the molecular equation is
H2SO4 + KOH --> H2O + K2SO4
When balanced, it is
H2SO4 + 2KOH --> 2H2O + K2SO4