For the given reaction, choose the correct expression of from the following:

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Q.
For the given reaction, choose the correct expression of $K_{C}$ from the following:

${Fe}_{(a q)}^{3 +} + {SCN}_{(a q)}^{-} ⇌ {(FeSCN)}_{(a q)}^{2 +}$ [2024]

Solution

Q.
For the given reaction, choose the correct expression of $K_{C}$ from the following:

${Fe}_{(a q)}^{3 +} + {SCN}_{(a q)}^{-} ⇌ {(FeSCN)}_{(a q)}^{2 +}$ [2024]

1 $K_{C} = \frac{{[{FeSCN}^{2 +}]}^{2}}{[{Fe}^{3 +}] [{SCN}^{-}]}$

2 $K_{C} = \frac{[{FeSCN}^{2 +}]}{{[{Fe}^{3 +}]}^{2} {[{SCN}^{-}]}^{2}}$

3 $K_{C} = \frac{[{Fe}^{3 +}] [{SCN}^{-}]}{[{FeSCN}^{2 +}]}$

4 $K_{C} = \frac{[{FeSCN}^{2 +}]}{[{Fe}^{3 +}] [{SCN}^{-}]}$

Ans.
(4)

${Fe}^{3 +} (a q) + {SCN}^{-} (a q) ⇌ {(FeSCN)}^{2 +} (a q)$

$K_{c} = \frac{[{FeSCN}^{2 +}]}{[{Fe}^{3 +}] [{SCN}^{-}]}$

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Solution

Q. For the given reaction, choose the correct expression of KC from the following: Fe(aq)3++SCN(aq)-⇌(FeSCN)(aq)2+ [2024]

1 KC=[FeSCN2+]2[Fe3+][SCN-]

2 KC=[FeSCN2+][Fe3+]2[SCN-]2

3 KC=[Fe3+][SCN-][FeSCN2+]

4 KC=[FeSCN2+][Fe3+][SCN-]

Ans. (4) Fe3+(aq)+SCN-(aq)⇌(FeSCN)2+(aq) Kc=[FeSCN2+][Fe3+][SCN-]

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Q.
For the given reaction, choose the correct expression of $K_{C}$ from the following:

${Fe}_{(a q)}^{3 +} + {SCN}_{(a q)}^{-} ⇌ {(FeSCN)}_{(a q)}^{2 +}$ [2024]

1 $K_{C} = \frac{{[{FeSCN}^{2 +}]}^{2}}{[{Fe}^{3 +}] [{SCN}^{-}]}$

2 $K_{C} = \frac{[{FeSCN}^{2 +}]}{{[{Fe}^{3 +}]}^{2} {[{SCN}^{-}]}^{2}}$

3 $K_{C} = \frac{[{Fe}^{3 +}] [{SCN}^{-}]}{[{FeSCN}^{2 +}]}$

4 $K_{C} = \frac{[{FeSCN}^{2 +}]}{[{Fe}^{3 +}] [{SCN}^{-}]}$

Ans.
(4)

${Fe}^{3 +} (a q) + {SCN}^{-} (a q) ⇌ {(FeSCN)}^{2 +} (a q)$

$K_{c} = \frac{[{FeSCN}^{2 +}]}{[{Fe}^{3 +}] [{SCN}^{-}]}$