How many moles of ions (cation & anion) are present in 1 mole of pentaamminenitrito-Ocobalt(III) diaquabis(oxalato)cobaltate(III)

Question

TestHub · Accepted Answer

Given compound:

Pentaamminenitrito-O-cobalt(III) diaquabis(oxalato)cobaltate(III)**

Formula:

$[C o (N H_{3})_{5} (ONO)] [C o (H_{2} O)_{2} (C_{2} O_{4})_{2}]$

Charge calculation:

Cation: $[C o (N H_{3})_{5} (ONO)]^{2 +}$

( $C o^{3 +}$ and $ON O^{-} \Rightarrow + 2$ )

Anion: $[C o (H_{2} O)_{2} (C_{2} O_{4})_{2}]^{-}$

( $C o^{3 +}$ and $2 \times C_{2} O_{4}^{2 -} \Rightarrow - 1$ )

To neutralize charges:

$[C o (N H_{3})_{5} (ONO)] [C o (H_{2} O)_{2} (C_{2} O_{4})_{2}]_{2}$

On dissociation:

$[C o (N H_{3})_{5} (ONO)]^{2 +} + 2 [C o (H_{2} O)_{2} (C_{2} O_{4})_{2}]^{-}$

Thus, 1 cation + 2 anions = 3 ions.

$3.00 m o l eso f i o n s$

Chemistry - Coordination Chemistry Question with Solution | TestHub