What is metaphophoric (HPO3)?

Polymeric form of Ortho phosphoric is called meta phosphoric acid, it exist as dimer, trimer and polymer but trimer and Hexamer is more common.

(1) Trimer of phosphoric acid exists as cyclic trimer which contains three P-O-P bonds.

(2) Hexamer of phosphoric acid exist as sodium salt which is called sodium metaphophate or sodium polymetaphosphate and it is commercially  known as "CALGON" and use as water softener.

Related Questions:

What are "pyro" oxy acids?

What are "Ortho" or "Meta" oxyacids?

What is Meta Boric Acids?

What are the structural difference between oxides ( P4O6 and P4O10) of phosphorous?

What are common structural features of oxides (P4O6 and P4O5) of phosphorous?

Why Borazine is more reactive than benzene towards Electrophic Aromatic substitution reactions ?

 In Borazine molecule, nitrogen is more electro negative than the boron. Nitrogen acquires partial negative charge and boron acquires partial positive charge and back bonding take place between boron and nitrogen. And it is more reactive as compared with Benzene, because Borazol is less stable and more reactive toward Electrophilic Aromatic Substitution reactions due to high polarity of B-N bonds borazine molecule while in benzene all bonds are non polar.

                                 Borazine 

What is product obtained when N2O5 is treated with NaCl?

When N₂O₅ is treated with NaCl with NaCl solution then ionic reaction occurs and NaNO₃ and NO₂Cl is formed.

          N₂O₅ + NaCl --> NaNO₃ + NO₂Cl

This reaction proves that solid N₂O₅ is in ionic nature.

          N₂O₅(s) ---->[ NO₂]⁺  + [NO₃]^-

N₂O₅ is a rare example of a compound that adopt two structure depending on the conditions most commonly it is a salt, but under some conditions it is a polar molecule.

            [NO₂]⁺  + [NO₃]^- = [N₂O₅]

Related Questions:

Which is more basic N(CH3)3 or N(SiH3)3 , explain?

Trisilyl amine, N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.

Are all the five bonds of PCl5 equivalent? Justify your answer.

What are common structural features of oxides (P4O6 and P4O5) of phosphorous?

What are the structural difference between oxides ( P4O6 and P4O10) of phosphorous?

What are abnormal behaviour of Nitrogen atom as compared to other family members?

What is product obtained when N2O5 is treated with NaCl?

What is metaphophoric (HPO3)?

Phosphorus can form PCl5 but nitrogen can not form NCl5 why?

Why PCl3 hydrolysed while NCl3 can not be hydrolysed?