Redox

Question 1

Answering format for redox:

Answer 1

___ was oxidised as the O.S. of ___ increases from ___ in ___ to ___ in ___

___ was reduced as the O.S. of ___ decreases from ___ in ___ to ___ in ___.

Question 2

Why is this a redox reaction

Answer 2

The oxidation of ___ and reduction of ___ take place simultaneously. Hence, this is a redox reaction

Question 3

Test for OA

Answer 3

Add aqueous potassium iodide to the solution. KI turns from colourless to brown if it is oxidised

Question 4

Test for RA

Answer 4

Add aqueous potassium manganate to the solution. KMnO4 turns from purple to colourless if it is reduced

Add aqueous potassium dichromate to the solution. K2Cr2O7 turns from orange to green if it is reduced