Question 3 of 31beginner🔧 ApplyVery Short2 marks
Using Stock notation, represent the following compounds: HAuCl₄, Tl₂O, FeO, Fe₂O₃, CuI, CuO, MnO and MnO₂.
(i)
Answer
HAu(III)Cl
(ii)
Answer
Tl(I)O
(iii)
Answer
Fe(II)O
(iv)
Answer
Fe(III)O
(v)
Answer
Cu(I)I
(vi)
Answer
Cu(II)O
(vii)
Answer
Mn(II)O
(viii)
Answer
Mn(IV)O
Explanation
According to Stock notation, the oxidation number of a metal is represented by putting a Roman numeral in parenthesis after the symbol of the metal in the molecular formula. By calculating the oxidation number of each metallic element in the given compounds, we find Au has +3, Tl has +1, Fe has +2 and +3, Cu has +1 and +2, and Mn has +2 and +4. These are then written in Roman numerals within parentheses after the respective metal symbols.