Question

What is the molar mass of \[{H_2}C{O_3}\]?

Answer 1

Hint: We have to know that \[{H_2}C{O_3}\] is a molecular formula for carbonic acid. As the name has acid in it, so it is easy to say that it has carboxylic acid functional group in it i.e. $COOH$. But it also has hydroxyl functional group since acid is always on higher priority than alcohol thus it is easy to say that it is an acid. The units of molar mass is \[g/mol\]. Carbonic acid is also a dibasic acid.

Complete answer:
We must have to remember that the molar mass can also be known as atomic mass which is approximately double of atomic number. In order to get the molar mass of the given molecule we must know the molar mass of each element present in a particular compound.
Let’s calculate molar mass of carbonic acid which is \[{H_2}C{O_3}\]
Molar mass of Hydrogen=\[1\] (since \[2\] atoms of hydrogen are there, so molar mass will be\[2\])
Molar mass of Carbon=\[12\]
Molar mass of Oxygen= \[16\](since \[3\]atoms of oxygen are there, so molar mass will be\[48\])
Molar mass of \[{H_2}C{O_3}\]=\[2 + 12 + 48\]= \[62{\text{ }}g/mol\]

Note:
We have to remember that the carbonic acid behaves as dibasic acid since it has two hydrogen atoms or you can say it has two protons to transfer. This acid decomposes itself to form carbon dioxide in presence of water and usually \[{H_2}C{O_3}\] is stable at room temperature. It is a weak acid it dissociates itself into a proton and a bicarbonate ion. Dissociation of carbonic acid takes place like this.
\[{H_2}C{O_3}\underset {} \leftrightarrows {H_2}O + C{O_2}\]