Acid-base titration combination

Question

For the acid-base titration combination of H2SO4 with 0.73 mol Al(OH)3, find the number of moles of H2SO4 that would be the chemically equivalent amount of Al(OH)2. Answer in units of mol.

Answer 1

1 mole of Al(OH)3 = 3 moles OH

1 mole of H2SO4 - 2 moles of H+

so 0.73 moles of Al(OH)3 = 3 X 0.73 = 2.19moles of OH

so you need 2.19 moles of H+ supplied by H2SO2    so if each mole supplies 2 moles of H+  then 1.095 moles of H2SO4 supply 2.19 moles of H+.enough to exactly react with the 2.19 moles of OH coming from the Al(OH)3