2. Calculate the equivalent masses of acids and bases in the following reactions expressed by the equations:
a) H3PO4 Ca(OH)2 = CaHPO4 2H2O
b) 2HCl Bi(OH)3 = BiOHCl2 2H2O
c) 3H2SO4 2Al(OH)3 = Al2(SO4)3 6H2O
d) Fe(OH)3 3HСl = FeCl3 3H2O

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