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Complete and balance te following: a) Al + H+ -----> H2 + Al+3 b) S-2(aq) +...

Complete and balance te following:

a) Al + H+ -----> H2 + Al+3

b) S-2(aq) + Al(s) -----> Al+3 + S-2

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Answer #1

   a.    2Al (s) ----------------> 2Al^3+(aq) + 6e^-

         6H^+ (aq) + 6e^- ------->3H2(g)

       --------------------------------------------------

   2Al(s) + 6H^+ (aq) --------------> 2Al^3+ (aq) + 3H2(g)

b. 2Al (s) ----------------> 2Al^3+(aq) + 6e^-

     3S(s) + 6e^- -------------> 3S^2- (aq)

--------------------------------------------------------

2Al(s) + 3S(s) --------------> 2Al^3+ (aq) + 3S^2- (aq)

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