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How many total electrons must be transferred to form one formula unit of the compound al2o3?.

Sagot :

Six electrons are transferred in the formation of Al₂O₃.

Aluminum metal and Oxygen react to form Al₂O₃ as,

                 2 Al  +  3/2 O₂    →    Al₂O₃

Oxidation number of Al on left hand side is zero, while than on right hand side in Al₂O₃ is +3.

It means it has lost 3 electrons per one atom and six electrons per two atoms. Also, the oxidation number of O at left hand side in O₂ is zero, while that in Al₂O₃ it is -2 per atom and -6 per 3 atoms.

So, two Al atoms have lost 6 electrons and 3 O atoms have gained six electrons.

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Answer:

6

Explanation:

Al has a left-side oxidation number of zero and a right-side oxidation number of three. means that it has lost three electrons for every single atom and six for every two atoms. Additionally, the left-hand side of O2 has an oxidation number of zero, whereas Al2O3 has an oxidation number of -2 per atom and -6 per three atoms.  Thus, three O atoms have received six electrons whereas two Al atoms have lost 6 electrons.