[VERY URGENT}In NCERT Chemistry part 2 class 12 page 72 How to find value of n from reaction? plzz tell fast test is tommorow
n value comes from the number of electrons involved in the given reaction.
In this example the reaction is as follows:
Mg + 2Ag+ → Mg2+ + 2Ag
Fromn the above reaction we can see that Mg is changinto Mg2+ and Ag+ is changing into Ag. Half-cell reaction can be written as:
Mg → Mg2+ + 2e-
Ag+ + e- → Ag
As in the first reaction there is change of 2 electrons. We multiply by 2 in the second reaction so the number of electron transfer is same. So there is total of two electrons change in the reaction. Hence value of n is 2.
In this example the reaction is as follows:
Mg + 2Ag+ → Mg2+ + 2Ag
Fromn the above reaction we can see that Mg is changinto Mg2+ and Ag+ is changing into Ag. Half-cell reaction can be written as:
Mg → Mg2+ + 2e-
Ag+ + e- → Ag
As in the first reaction there is change of 2 electrons. We multiply by 2 in the second reaction so the number of electron transfer is same. So there is total of two electrons change in the reaction. Hence value of n is 2.