
The tribasic acid is:
A. \[{{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{\text{4}}}\]
B. \[{{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{2}}\]
C. \[{{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{2}}\]
D. \[\text{HP}{{\text{O}}_{3}}\]
Answer
484.8k+ views
Hint: A tribasic acid in a reaction donates three hydrogen atoms (ions) in an acid-base reaction. So every tribasic acid has three replaceable hydrogen atoms. Dibasic acid refers to an acid having two replaceable hydrogen atoms and monobasic has only one replaceable hydrogen atom.
Complete answer:
The basicity of an acid is equivalent to the number of \[{{H}^{+}}\]produced by an acid, when it gets ionized in the aqueous medium. The \[{{H}^{+}}\] can only be given then it is attached to an oxygen atom in case of phosphorus oxides. So, the number of hydrogens that are attached to the oxygen atom contribute to the basicity of the acid. ${{H}_{3}}P{{O}_{4}}$ is a tribasic acid. Here, all the three hydrogen atoms are replaceable. In the case of ${{H}_{3}}P{{O}_{4}}$one of the hydrogen atoms is bound to phosphate atom therefore acting as a dibasic acid. has two hydrogen atoms attached to the phosphate ion and therefore is a monobasic acid. $HP{{O}_{3}}$ is also a monobasic acid as it has only one hydrogen which is replaceable. \[{{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{2}}\]
also has only two hydrogens attached to oxygen atoms so it possesses only two replaceable hydrogens and it is thus dibasic.
The correct option is therefore option (A) which is phosphoric acid ${{H}_{3}}P{{O}_{4}}$ .
So, the correct answer is “Option A”.
Note: Only those hydrogen atoms are counted to determine basicity of an acid which are replaceable and not all the hydrogens present in the acid. The hydrogens directly attached to carbon or any other less electronegative element are not acidic and are not released as \[{{H}^{+}}\] in the aqueous solutions.
Complete answer:
The basicity of an acid is equivalent to the number of \[{{H}^{+}}\]produced by an acid, when it gets ionized in the aqueous medium. The \[{{H}^{+}}\] can only be given then it is attached to an oxygen atom in case of phosphorus oxides. So, the number of hydrogens that are attached to the oxygen atom contribute to the basicity of the acid. ${{H}_{3}}P{{O}_{4}}$ is a tribasic acid. Here, all the three hydrogen atoms are replaceable. In the case of ${{H}_{3}}P{{O}_{4}}$one of the hydrogen atoms is bound to phosphate atom therefore acting as a dibasic acid. has two hydrogen atoms attached to the phosphate ion and therefore is a monobasic acid. $HP{{O}_{3}}$ is also a monobasic acid as it has only one hydrogen which is replaceable. \[{{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{2}}\]
also has only two hydrogens attached to oxygen atoms so it possesses only two replaceable hydrogens and it is thus dibasic.
The correct option is therefore option (A) which is phosphoric acid ${{H}_{3}}P{{O}_{4}}$ .
So, the correct answer is “Option A”.
Note: Only those hydrogen atoms are counted to determine basicity of an acid which are replaceable and not all the hydrogens present in the acid. The hydrogens directly attached to carbon or any other less electronegative element are not acidic and are not released as \[{{H}^{+}}\] in the aqueous solutions.
Recently Updated Pages
The correct geometry and hybridization for XeF4 are class 11 chemistry CBSE

Water softening by Clarks process uses ACalcium bicarbonate class 11 chemistry CBSE

With reference to graphite and diamond which of the class 11 chemistry CBSE

A certain household has consumed 250 units of energy class 11 physics CBSE

The lightest metal known is A beryllium B lithium C class 11 chemistry CBSE

What is the formula mass of the iodine molecule class 11 chemistry CBSE

Trending doubts
10 examples of friction in our daily life

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE

Difference Between Prokaryotic Cells and Eukaryotic Cells

State and prove Bernoullis theorem class 11 physics CBSE

What organs are located on the left side of your body class 11 biology CBSE

How many valence electrons does nitrogen have class 11 chemistry CBSE
