In the following reactions:
$space space left parenthesis straight i right parenthesis space straight H subscript 2 straight O space plus space 2 FeCl subscript 3 space space space space space rightwards arrow space space space space 2 FeCl subscript 2 space plus space 2 HCl space plus space straight S space space left parenthesis ii right parenthesis space 2 Al space plus space Fe subscript 2 straight O subscript 3 space space rightwards arrow space space space Al subscript 2 straight O subscript 3 space plus space 2 Fe$

which is oxidised to what and which is reduced to what? Also, mention the oxidising and reducing agent.

Solution

Here, H₂S reduces FeCl₃ to FeCl₂ while itself gets oxidised to S. Conversely, FeCl₃oxidises H₂S to S while itself gets reduced to FeCl₂. Therefore H₂S acts as a reducing agent while FeCl₃ acts as an oxidising agent.

Here, Al reduces Fe₂O₃ to Fe while itself gets oxidised to Al₂O₃. Conversely, Fe₂O₃oxidises Al to Al₂O₃ while itself gets reduced to Fe. Therefore Al acts as a reducing agent while Fe₂O₃ acts as an oxidising agent.