a) Sn+2 HCl--->SnCl2+H2
b) Fe+2 HNO3--->Fe(NO3)2+H2
c) 2 Al+3 H2SO4--->Al2(SO4)3+3 H2
d) 2 K+H2S--->K2S+H2
e) 3 Ni+2 H3PO4--->Ni3(PO4)2+3 H2
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a) Sn+2 HCl--->SnCl2+H2
b) Fe+2 HNO3--->Fe(NO3)2+H2
c) 2 Al+3 H2SO4--->Al2(SO4)3+3 H2
d) 2 K+H2S--->K2S+H2
e) 3 Ni+2 H3PO4--->Ni3(PO4)2+3 H2