Question

The oxidation number of phosphorus in pyrophosphoric
acid is
(a) +3 (b) +1
(c) +4 (d) +5

Answer 1

Answer:

the oxidation number of phosphorus in payrophosphori

Explanation:

(a) +3

Answer 2

Pyrophosphoric acid or H4P2O7, has two phosphorous, both in oxidation state of +5.

Explanation:

• Pyrophosphoric acid is the anhydride of phosphoric acid.

• This is formed when two phosphoric acids coalesce and let's off a water molecule.

• The pyrophosphoric acid as shown in the diagram contains 2 phosphorous, 7 oxygen atoms of which 2 oxygen has double bonds with phosphorous, rest have single bonds.

• The phosphorous is in the +5 oxidation state, oxygen being - 2 and hydrogen being +1 as usual.

For more information about oxidation number,

https://brainly.in/question/12174101

Calculate the oxidation

culate the oxidation number of

underlined atoms.

1. H2so4

2. HNO3

3. H3PO3

4. K2C2O4

5. H2S4O6

6. Cr2O7

7. NaH2pO7

https://brainly.in/question/2161394

Question 8.2 What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results?

(a) KI3 (b) H2S4O6 (c) Fe3O4 (d) CH3CH2OH (e) CH3COOH