K2Cr2O7+H2O K(+1)Cr(+6)O(-2) + H(+1)O(-2)
Mg+HNO3 Mg(0) + H(+1) N(+5)O(-2)
H2SO3+HCLO3 H(+1)S(+4)O(-2) + H(+1) Cl(+5)O(-2)
H2SO4+HCL H(+1)S(+6)O(-2) +H(+1)CL(-1)
CuS+HNO3 Cu(+2)S(-2) + H(+1)N(+5)O(-2)
K2Cr2O7+H2O K(+1)Cr(+6)O(-2) + H(+1)O(-2)
Mg+HNO3 Mg(0) + H(+1) N(+5)O(-2)
H2SO3+HCLO3 H(+1)S(+4)O(-2) + H(+1) Cl(+5)O(-2)
H2SO4+HCL H(+1)S(+6)O(-2) +H(+1)CL(-1)
CuS+HNO3 Cu(+2)S(-2) + H(+1)N(+5)O(-2)