______+HCl------>AlCl3+______ Mg+_______----->_______+H2 _______+H2CO3------>K2CO3+H2 Na+________------>NaCl+________
2Al +6 HCl = 2AlCl3 +3 H2
Mg +2HCl = MgCl2 + H2
K + H2CO3 = K2CO3 + H2
2Na +2 HCl =2 NaCl + H2
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