
How many $P - O - P$ bonds(s) is/are present in ${H_6}{P_6}{O_{18}}$ ?
Answer
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Hint: ${H_6}{P_6}{O_{18}}$ is known as meta-phosphoric acid. Generally, the number of ${\text{P - O - P}}$ bonds in cyclic metaphosphoric acid is three. ${\text{P - O - P}}$ bonds are the bond linkages present between two phosphorus atoms and one oxygen atom.
Complete step by step answer: The general formula of metaphosphoric acids is ${\text{(HP}}{{\text{O}}_{\text{3}}}{\text{)n}}$ where n denotes the number of phosphoric acid units present in the ring. ‘n’ can be equal to three or greater than three. Metaphosphoric acids have phosphorus in the oxidation state of ${\text{ + 5}}$. It generally decomposes in water and is soluble in alcohol. It is an odorless, glassy substance.
${H_6}{P_6}{O_{18}}$ is meta-phosphoric acid . it is a corrosive inorganic , cyclic polyphosphate formed from bonded phosphoric acid units.
It has applications in biochemistry, agriculture , pharmacy and chemical research.
Structure of meta-phosphoric acid is :
As it is clear from the above representation of meta-phosphoric acid, there are three $P - O - P$ bonds.
So, the answer to the question will be three.
Additional Information:
-Meta-phosphoric acid is used by food analytics to determine the vitamins.
-The biochemistry also makes use of this compound to precipitate protein in biological liquids such as blood and urine.
-For vets, it can be used to check the urea in cattle blood.
-It can also be used as an additive in the production of diagnostic test strips for the pharmaceutical industry.
-Metaphosphoric acid is used to prevent oxidation of reduced glutathione.
Note: Meta-phosphoric acid or ${H_6}{P_6}{O_{18}}$ has various uses in various fields. The number of $P - O - P$ bonds in cyclic meta-phosphoric acid is three. Moreover, metaphosphoric acid seems to have some hazardous effects, it can cause burns and may cause injuries to the upper respiratory tract and lungs if inhaled.
Complete step by step answer: The general formula of metaphosphoric acids is ${\text{(HP}}{{\text{O}}_{\text{3}}}{\text{)n}}$ where n denotes the number of phosphoric acid units present in the ring. ‘n’ can be equal to three or greater than three. Metaphosphoric acids have phosphorus in the oxidation state of ${\text{ + 5}}$. It generally decomposes in water and is soluble in alcohol. It is an odorless, glassy substance.
${H_6}{P_6}{O_{18}}$ is meta-phosphoric acid . it is a corrosive inorganic , cyclic polyphosphate formed from bonded phosphoric acid units.
It has applications in biochemistry, agriculture , pharmacy and chemical research.
Structure of meta-phosphoric acid is :

As it is clear from the above representation of meta-phosphoric acid, there are three $P - O - P$ bonds.
So, the answer to the question will be three.
Additional Information:
-Meta-phosphoric acid is used by food analytics to determine the vitamins.
-The biochemistry also makes use of this compound to precipitate protein in biological liquids such as blood and urine.
-For vets, it can be used to check the urea in cattle blood.
-It can also be used as an additive in the production of diagnostic test strips for the pharmaceutical industry.
-Metaphosphoric acid is used to prevent oxidation of reduced glutathione.
Note: Meta-phosphoric acid or ${H_6}{P_6}{O_{18}}$ has various uses in various fields. The number of $P - O - P$ bonds in cyclic meta-phosphoric acid is three. Moreover, metaphosphoric acid seems to have some hazardous effects, it can cause burns and may cause injuries to the upper respiratory tract and lungs if inhaled.
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