Need help ASAP with oxidation and reduction reactions!!!?

Question

Indicate the oxidation and reduction reaction in each:

Mg + 2HCl --------- MgCl2 + H2

2AgBr --------- 2Ag + Br2

Answer 1

Magnesium here is oxidised (it goes from 0 to +2); Hydrogen is reduced (+1 to 0)
The Mg half reaction is:
Mg--->Mg++ + 2e-
The Hydrogen half reaction is:
H+ +e- ----->H

Silver is reduced (it goes from +1 to 0) and Bromine is oxidized (-1 to 0).

Reduction half reaction:
Ag+ +e- ------->Ag
Oxidation half reaction:
Br- ----->Br +e-

Answer 2

Magnesium is going from 0 to +2...oxidized. Hydrogen from +1 to 0...reduced

Silver is going from +1 to 0....reduced. Bromine from -1 to 0...oxidized.

Hope this helps.