I think it is O2- , is this right?
2006-11-21 02:24:12 · 10 answers · asked by steven11111958 1 in Science & Mathematics ➔ Chemistry
Ca goes from an oxidation state of zero to an oxidation state of +2. This indicates that Ca lost electrons and is therefore oxidized in this equation. Also Oxygen in O2 has an oxidation state of zero and goes to an oxidation state of -2 in the CaO. Since Oxygen gained electrons it was reduced in the reaction.
2006-11-21 02:32:11 · answer #1 · answered by mg 3 · 1⤊ 0⤋
O2 having an initial oxidation state of 0 becomes -2 whenever the CaO is produced. This would be a reduction.
Ca metal goes from an inital oxidation state of 0 to a final oxidation state of +2. Therefore it is losing electrons and is oxidized.
So the correct answer would be Ca is oxidized in this reaction. Hope this helps!
2006-11-21 10:30:43 · answer #2 · answered by utwahoo 2 · 0⤊ 0⤋
Calcium. Oxidation number increased from 0 to 2+. Oxygen is reduced. Oxidation number fell from 0 to 2-.
2006-11-21 10:38:38 · answer #3 · answered by James S 3 · 1⤊ 0⤋
for all those who is confused, Oxidation is the loss of electons ( more + value) and reduction referrs to the gain of electrons ( more - value)
so O^-2 is being reduced because it gained electrons from the starting state of O2 which has a power of zero
Ca^+2 is being oxidized because it has lost electrons from the starting state of Ca which also has a power of zero
2013-12-05 16:24:20 · answer #4 · answered by Pauline 1 · 1⤊ 0⤋
oxygen is oxidized b coz ca has an oxidation no. of 0 in 2ca an in CaO it has an oxidation no. of -1
and in O2 oxygen has an oxidation no. 0 an in CaOit is -2
hence oxygen is oxidizing therefore it is reducing agent
& Ca is undergoin reduction an therefore it is oxidizing agent
2006-11-21 11:36:51 · answer #5 · answered by deep s 2 · 0⤊ 1⤋
Ca is oxidized. O2 is oxidant, it means that it (O2) can be reduced.
2006-11-21 11:15:33 · answer #6 · answered by Anonymous · 1⤊ 0⤋
Sorry, you're mistaken. since there's only 2 elements in the compound, it's always the other element which gets oxidized. Oxygen cannot oxidize itself.
2006-11-21 10:45:49 · answer #7 · answered by dolly m 2 · 0⤊ 1⤋
No? iwould rather say Calcium. Oxygen is an oxidant
2006-11-21 10:49:11 · answer #8 · answered by maussy 7 · 1⤊ 0⤋
its not....
o2 has oxidised ca here....
the method is to calculate the oxidation number....(ON)
the ON of free elements =0(ca,o2,h2...)
compounds hav 0 as the net ON...
ON of cao=0..
here ON of ca (in compound)=+2 and that of o2 is -2...
since ON of ca has increased from 0 to +2.
it has been oxidised and o2 has been reduced
2006-11-21 10:32:56 · answer #9 · answered by sriraam h 2 · 0⤊ 1⤋
No, it is the calcium which is oxidized.
2006-11-21 10:32:29 · answer #10 · answered by metatron 4 · 1⤊ 1⤋