Question

| 40. State the rules for calculating oxidation state​

Answer 1

Answer:

• The convention is that the cation is written first in a formula, followed by the anion. ...
• The oxidation number of a free element is always 0. ...
• The oxidation number of a monatomic ion equals the charge of the ion. ...
• The usual oxidation number of hydrogen is +1. ...
• The oxidation number of oxygen in compounds is usually -2.

Answer 2

Answer:

Rules for Assigning Oxidation Numbers to Elements :

Explanation:

Rule 1: The oxidation number of an element in its free (uncombined) state is zero — for example, Al(s) or Zn(s). ...

Rule 2: The oxidation number of a monatomic (one-atom) ion is the same as the charge on the ion, for example:

Rule 3: The sum of all oxidation numbers in a neutral compound is zero.