A mixture of 3 Ca(OH)₂ formula units and 5 HCl molecules reacts according to Ca(OH)₂(aq) + 2 HCl(aq) → CaCl₂(aq) + 2 H₂O(l). Which reactant is limiting?
a) Ca(OH)2
b) HCl
c) Cannot be determined from the information given
d) Neither; the reactants are already in the required stoichiometric ratio