Question

How many moles of hydrochloric acid (HCl) would it take to completely neutralize one mole of aluminum hydroxide, Al(OH)3?

Answer 1

mole ratio:

3 HCl + Al(OH)₃ → AlCl₃ + 3H₂O

3 moles HCl -------- 1 mole Al(OH)₃
?? moles HCl ------- 1 mole Al(OH)₃

1 x 3 / 1 => 3 moles of HCl