Which ionisation potential (IP) in the following equations involves the greatest ammount of energy?

K^{+} \to K^{+ 2} + e^{-}

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L i^{+} \to L i^{+ 2} + e^{-}

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F e \to F e^{+} + e^{-}

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C a^{+} \to C a^{+ 2} + e^{-}

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Solution

The correct option is A $L i^{+} \to L i^{+ 2} + e^{-}$
The second ionization potential of Li involves greatest amount of energy as it involves breaking of stable $1 s^{2}$ electronic configuration.
$L i^{+} \to L i^{2 +} + e^{-}$
$1 s^{2} \to 1 s^{1}$
The second ionization of potassium, the first ionization of Fe and the second ionization of Ca requires removal of an electron from $[A r]$ , $3 d^{6} 4 s^{1}$ and $4 s^{1}$ electronic configurations respectively.

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Similar questions

Q. Which ionisation potential (IP) in the following equations involves the greatest amount of energy?

Calculate the valency factor of the following:
(i) Ca $\to$ ${C a}^{2 +}$ + 2 $e^{-}$
(ii)K $\to$ $K^{+}$ + $e^{-}$
(iii) ${M n}^{7 +}$ + 5 $e^{-}$ $\to$ ${M n}^{2 +}$

Q. What is the standard reduction potential

(E^{o})

for

F e^{3 +} \to F e

Given that:

F e^{2 +} + 2 e 6 - \to F e; E_{F}^{o} e_{F e^{2 +} / F e} = - 0.47 V

F e^{3 +} + e^{-} \to F e^{2 +}; E_{F e^{3 +} / F e^{2 +}}^{o} = + 0.77 V

Q. What is the standard reduction potential

(E^{o})

for

F e^{3 +} \to F e

?
Given that:

F e^{2 +} + 2 e^{-} \to F e; E_{F e^{2 +} / F e}^{o} = - 0.47 V

F e^{3 +} + e^{-} \to F e^{2 +}; E_{F e^{3} / F e^{2 +}}^{o} = + 0.77 V

Given standard electrode potentials:

$F e^{3 +} + 3 e^{-} \to F e; E^{0} = - 0.036 V$

$F e^{2 +} + 2 e^{-} \to F e; E^{0} = - 0.440 V$

The standard electrode potential $E^{o}$ for $F e^{3 +} + e^{-} \to F e^{2 +}$ is:

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