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Solved: Phosphorus forms many oxoacids. Indicate the
Chapter 4, Problem 46P(choose chapter or problem)
Phosphorus forms many oxoacids. Indicate the oxidation number of phosphorus in each of the following acids: (a) HPO3, (b) H3PO2, (c) H3PO3, (d) H,PO4, (e) H2P2O7, (f) H5P3O10.
(a) \(\mathrm{HPO}_{3}\),
(b) \(\mathrm{H}_{3} \mathrm{PO}_{2}\),
(c) \(\mathrm{H}_{3} \mathrm{PO}_{3}\),
(d) \(\mathrm{H}_{3} \mathrm{PO}_{4}\),
(e) \(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}\)
(f) \(\mathrm{H}_{5} \mathrm{P}_{3} \mathrm{O}_{10}\)
Questions & Answers
QUESTION:
Phosphorus forms many oxoacids. Indicate the oxidation number of phosphorus in each of the following acids: (a) HPO3, (b) H3PO2, (c) H3PO3, (d) H,PO4, (e) H2P2O7, (f) H5P3O10.
(a) \(\mathrm{HPO}_{3}\),
(b) \(\mathrm{H}_{3} \mathrm{PO}_{2}\),
(c) \(\mathrm{H}_{3} \mathrm{PO}_{3}\),
(d) \(\mathrm{H}_{3} \mathrm{PO}_{4}\),
(e) \(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}\)
(f) \(\mathrm{H}_{5} \mathrm{P}_{3} \mathrm{O}_{10}\)
ANSWER:
Solution 46P:
Here we have to calculate the oxidation state of P in the given compounds.
Here all the compounds contain H, P and O. Let us consider the oxidation of P is x, it is known that oxidation state of H is +1 and oxidation state of O is -2.
Step 1
(a) HPO3
The oxidation of P in HPO3 can be calculated as follows,
1+ x + 3(2-) = 0
x = 5
The oxidation state of P in HPO3 found to be +5.