potassium hydroxide react with sulfuric acid to give potassium sulphate and water
2KOH +H2SO4 --->K2SO4 +2H2O
from the equation above 2 moles of KOH react with 1 mole of H2SO4
This means that the reacting ratio is of KOH to H2SO4 is 2:1
THe moles of H2SO4 IS 0.30 X1/2 =0.15moles