Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
Introduction to Oxoacids of Phosphorus
Hypo Phosphorous Acid (H3PO2) or Phosphinic Acid
Phosphorous Acid (H3PO3) or Phosphonic Acid
Hypophosphoric Acid (H4P2O6)
Orthophosphoric Acid (H3PO4)
Pyrophosphoric Acid (H4P2O7)
Meta Phosphoric (HPO3)n
Phosphorus forms various oxoacids. They are hypophosphorous acid (H3PO2), Phosphorous acid (H3PO3), Hypophosphoric acid (H3PO4), pyrophosphoric acid (H4P2O7) and meta phosphoric acid (HPO2) n.
Oxoacids of Phosphorus are given in table beneath.
Hypophosphorus acid
Phosphorus acid
Hypophosphoric acid
Orthophosphoric acid
Diphosphoric acid (Pyrophosphoric acid)
Metaphosphoric acid
Peroxophosphoric acid
Among the oxoacids of phosphorus, orthophosphoric acid is the most critical and is utilized as a part of the produce of phosphate manures.
It is set up by the oxidation of phosphine by iodine within the sight of figured amount of water. It is a monobasic acid.
PH3 + 2I2 + 2H2O -----------> H3PO2 + 4 HI
Fig. 1: Hypo Phosphorous Acid
It is set up by hydrolysis of phosphorous trioxide (P4O6). Phosphorous acid is dibasic in nature.
P4O6 + 6H2O ----------> 4H3PO3
Fig. 2: Phosphorous Acid
It is set up by controlled oxidation of red phosphorus with sodium chlorite arrangement when disodium salt of the hypophosphoric acid is obtained it is passed through cation exchanger to yield hypophosphoric acid. Hypophosphoric acid is tetrabasic in nature.
2P + 2NaClO2 + 2H2O ---------> Na2H2P2O6 + 2HCl Na2H2P2O6 + 2H -----resin-----> H4P2O6 + 2Na – resin
Fig. 3: Hypophosphoric Acid
It is set up by treating P4O10 with bubbled water. It is a tribasic acid.
P4O10 + 6H2O ----------> 4H3PO4
Fig. 4: Orthophosphoric Acid
It is set up by heating orthophosphonic acid at about 250oC. It is a tetrabasic acid.
2H3PO4 ---------> H4P2O7 + H2O
Fig. 5: Pyrophosphoric Acid
It is formed by warming orthophosphoric acid to around 850 K. Metaphosphoric acid does not exist as monomer. It exists as cyclic trimer, cyclic tetramer or polymer.
H3PO4 ---------> HPO3 + H2O
Fig. 6: Metaphosphoric Acid
The structures of oxoacids of phosphorus are efficiently given ahead:
Fig. 7: Structure of oxoacids of phosphorus with their oxidation states and basic nature
The formulae of oxoacids of P can be remembered as:
Meta Acid is utilized for the acid got by the loss of one water particle.
Pyro Acid is utilized for the acid acquired by warming two atoms with the loss of one water particle.
Hypo is by and large utilized for the acid having lower oxygen content than the parent acid.
In any case, it might be noticed that metaphosphoric acid does not exist as basic monomer; it exists as cyclo metaphosphoric acid or poly metaphosphoric acid.
Watch this Video for more reference
More Readings
Oxoacids of Phosphorus
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Group 16 Elements Table of Content Occurrence and...
Oxides of Nitrogen Table of Content Oxides of...
Alkaline Earth Metals Table of Content Occurrence...
Phosphorus Halides Table of Content Phosphorus...
Sulphuric Acid Table of Content About Sulphuric...
Alkali Metals Table of Content Physical Properties...
Dioxygen Table of Content General Discussion...
Oxoacids of Sulphur Table of Content Introduction...
Important Trends and Anomalous Behaviour of Carbon...
Anomalous Properties of Lithium Table of Content...
Compounds of the Alkaline Earth Metals Table of...
Group 15 Elements Table of Content Introduction to...
Group 13 Elements – The Boron Family Table...
The s-Block Elements Table of Content Group 1...
Interhalogen Compounds Table of Content Definition...
Some Important Compounds of Calcium Table of...
Sulphur Dioxide Table of Content Methods to...
Simple Oxides Table of Content Simple Oxides Mixed...
Phosphine Table of Content Occurrence and...
General Characteristic of the Compounds of the...
The p-Block Elements Table of Content Definition...
Sodium Table of Content Minerals of Sodium...
Solved Problem Question 1: Lithium cannot be kept...
Some Important Compounds of Boron Table of Content...
Oxoacids of Halogens Table of Content Oxidation...
Lithium Table of Content Extraction of Lithium...
Hydrogen Chloride Table of Content Discovery of...
Chlorine Table of Content Introduction to Chlorine...
Phosphorus Allotropic Forms Table of Content...
Some Important Compounds of Sodium Table of...
Group 18 Elements Table of Content Occurrence and...
Sulphur: Allotropic Forms Table of Content...
Group 17 Elements Table of Content Introduction to...
Uses of Boron and Aluminium and their Compounds...
Beryllium Table of Content Physical Properties of...
Allotropes of Carbon Table of Content Allotropes...
Nitric Acid Table of Content Introduction to Nitic...
Ammonia Table of Content Occurrence Preparation of...
Biological Importance of Sodium and Potassium...
Ozone Table of Content General Characteristics and...
Magnesium Metal Table of Content Extraction of...
Important Trends and Anomalous Properties of Boron...
Biological Importance of Magnesium and Calcium...