4Cu + O2 --> What is the name of the compound ?

[parwana]

1. [1pt]

The below reaction gives one ionic compound as a product.

4Cu + O2 -->

What is the name of the compound ?

An example of the correct answer format would be lead(II) nitrate note the space

Its going to be copper(I) oxide right, but I don't understand why?

Also How many moles of the ionic compound are produced for the above reaction , would it be 4?

 

[Gokul43201]

First write and balance the complete reaction. There can be no discussion of the second part before you do this.

 

[parwana]

First write and balance the complete reaction. There can be no discussion of the second part before you do this.

Isnt it

4Cu + O2= 2Cu2O

so it would be 2 moles, but why is it copper I oxide, not copper II oxide

 

[mrjeffy321]

It is easier to oxidize somethingto +1 (usually), than it is to oxidize it to +2. Taking that first electron away isn't so tough, but the second requires much more energy.
Also, Copper (I) Oxide has a lower enthalpy of formation than Copper (II) Oxide, so it is more energy favorable for copper to oxidize to +1 than go all the way to +2.