Chem 30-hw help-urgent please

3. Aqueous iron (III) nitrate and aqueous tin (II) bromide are mixed.

a) List all the species present and identify the SOA and SRA
                 




b) Write the oxidation half-reaction:





c) Write the reduction half-reaction:




d) Write the net equation:




e) State whether or not the reaction is spontaneous or non-spontaneous





4a) Balance the reaction below if it is in an acidic environment

TeO32−(aq)  →Te(s)     






4b) Is the reaction an oxidation or reduction half-reaction?






5. Use the half-reaction method to balance the following chemical reaction that takes place in acidic solution: