The equivalent weight of a certain trivalent | vedclass

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Question

(C) Let the trivalent element be $M$. Since it is trivalent,its valency is $3$.
The formula of its oxide is $M_2O_3$.
The equivalent weight of $M$ i

Vedclass · Accepted Answer

$168$

Vedclass · Answer

(C) Let the trivalent element be $M$. Since it is trivalent,its valency is $3$.
The formula of its oxide is $M_2O_3$.
The equivalent weight of $M$ is $20$.
Atomic weight of $M = 	ext{Equivalent weight} 	imes 	ext{Valency} = 20 	imes 3 = 60$.
The molecular weight of the oxide $M_2O_3$ is calculated as:
$2 	imes (	ext{Atomic weight of } M) + 3 	imes (	ext{Atomic weight of } O) = 2 	imes 60 + 3 	imes 16 = 120 + 48 = 168$.

The equivalent weight of a certain trivalent element is $20$. The molecular weight of its oxide is:

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