Question

Write the formulae of different oxides of manganese. What is the oxidation state of manganese in them ? Arrange them in order of their decreasing acidic character​

Answer 1

Answer:

Solution :

(mixed oxide of

<br> As the oxidation state of

increases, the electronegativity value of the central metal ions increase. As a result of this difference in the electronegativity value between metals and oxygen decrease. So the acidic character increase as given below. <br>

Answer 2

The different oxides of Manganese are as follows:

$\sf{1) \: MnO}$

$\sf{2) \: Mn_{3} O_{4} }$

$\sf{3) \: Mn_{2} O_{3} }$

$\sf{4) \: Mn O_{2} }$

$\sf{5) \: Mn O_{3} }$

$\sf{6) \: Mn_{2} O_{7} }$

Oxidation states of Manganese in all the above oxides are as follows :

$\sf{1) \: MnO \: \: \: \: \: ( + 2)}$

$\sf{2) \: Mn_{3} O_{4} \: \: \: \: ( + 2, + 3) }$

$\sf{3) \: Mn_{2} O_{3} \: \: \: ( + 3)}$

$\sf{4) \: Mn O_{2} \: \: \: ( + 4) }$

$\sf{5) \: Mn O_{3} \: \: \: ( + 6) }$

$\sf{6) \: Mn_{2} O_{7} \: \: \: ( + 7) }$

Always remember the Thumb Rule:

• Higher oxidation state in case of magnus will have higher acidity.

Hence, Permanganate ion (Mn2O7) will have highest acidity followed by manganese trioxide followed by manganese dioxide, dimanganese trioxide and finally manganese monoxide.

HOPE IT HELPS.