What is the oxidation state of arsenic in H3AsO4?

We know, the sum of oxidation numbers of all entities is equal to total charge on compound. Hence, oxidation number of As in H3AsO4 is +5.Click to see full answer. Also question is, what is the oxidation state of arsenic in H3AsO3?+5Similarly, what is the oxidation state of each element in so2 − 4? 10. The sum of the oxidation numbers in a polyatomic ion is equal to the charge on the ion. The oxidation number of the sulfur atom in the SO42- ion must be +6, for example, because the sum of the oxidation numbers of the atoms in this ion must equal -2. what is the oxidation number for arsenic? Oxidation number is the property of an element in a chemical form. In AsH3, arsenic has oxidation number -3, but in AsF3, arsenic has oxidation number +3. In H3AsO4 (arsenic acid), arsenic has oxidation number +5. Those are the most common oxidation numbers for arsenic.What is the oxidation state of Fe?Explanation: However, the oxidation number of Fe in its compounds can take different values. The most common oxidation numbers of Fe are +2, as in FeCl2 , and +3, as in FeCl3 .