2.1.5 Redox

Question 1

Magnesium nitrate decomposes when heated, as shown in the equation.
2Mg(NO3)2(s) 2MgO(s) + 4NO2(g) + O2(g)
Using oxidation numbers, show which element has been oxidised and which has been reduced

Answer 1

Element oxidised:
Oxygen/O
Change from: –2 to 0
Element reduced: Nitrogen/N:
Change form + 5 to +4