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what is the n factor of so2 in fes2+o2->fe2o3+so2?

i got 5, n factor of s in fes2 is -1 and in so2 it is +4,since n factor is change in oxidation per molecule,it must be(4-(-1))=5,but answer is not matching.

0

For acids, it is the number of H ions that can be replaced. That is the measure of its basicity.

For bases, it is the number of replaceble OH ions. That is, the measure of its acidity.