A blackish brown colored solid , which is an oxide of manganese, when fused with alkali metal hydroxide and an oxidizing agent such as , produces a dark green colored compound . Compound on disproportionation in neutral and acidic solution gives a purple colored compound .
What is the molecular mass of compound ?
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( A ) → M n O 4 2 ( A ) M n O 2 + 4 K O H + K N O 3 → 2 ( B ) K 2 M n O 4 + O 2 + 2 H 2 O
On disproportionation in neutral and acidic solution gives a purple coloured compound,
The electrolytic oxidation is given by,
Manganate ion M n O 4 2 − Alkali Permanganate ion ( C ) M n O 4 −
∴ ( A ) = M n O 2 , ( B ) = K 2 M n O 4 , ( C ) = K M n O 4 . ∴ ( C ) Molecular mass = 3 9 + 5 5 + ( 1 6 × 4 ) = 3 9 + 5 5 + 6 4 = 1 5 8 .