Respostas

2013-11-09T15:18:02-02:00
A) 3 H2S2O3 + 2 Cr -> Cr2(S2O3)3 + 3 H2

b) 2 H3AsO3 + 3 Ba -> Ba3(AsO3)2 + 3 H2

c) 2 H4P2O7 + 4 Zn -> Zn4(P2O7)2 + 4 H2