What are the oxidation states for all of the elements in AlCl3?What are the oxidation states for all of the elements in AlCl3? A –1, +1    B –3, +3    C +1, –1    D +3, –3      ...

What are the oxidation states for all of the elements in AlCl3?

What are the oxidation states for all of the elements in AlCl3?

A –1, +1   
B –3, +3   
C +1, –1   
D +3, –3            

Asked on by tdj4325

2 Answers | Add Yours

sanjeetmanna's profile pic

sanjeetmanna | College Teacher | (Level 3) Assistant Educator

Posted on

`AlCl_3`

Aluminium Al oxidation state = +3

Aluminium atomic number = 13

Electronic Configuration = `1s^2 2s^2 2p^6 3s^2 3p^1` ` `

It loses 3 electrons from `3s^2` and `3p^1` and form +3 oxidation state.

Chlorine Cl oxidation state = -1

Atomic number = 17

Electronic Configuration = `1s^2 2s^2 2p^6 3s^2 3p^5`

It gains 1 electron and form -1 oxidation state.

The 3 electrons lost by Al is accepted by 3 Cl atom each.

Thus forming `AlCl_3`

Therefore the oxidation states are +3 and -1.

Since its not in options we can consider option D as answer assuming that....

3 electrons lost by Al atom and 3 electrons accepted by Cl atoms.

Thus option D +3, -3 is our answer.

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senioreeto's profile pic

senioreeto | Student, Undergraduate | (Level 1) Valedictorian

Posted on

Its option D +3,-3

because

oxidation state of Cl is -1,so 

oxidation state of Cl3 will be -3

and

oxidation state of Al will be +3 

to make the compound AlCl3 overall neutral.

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