Question

Write structure and molecular formula for the following compounds:
a. Orthophosphoric acid 
b. Sulphurous acid

Answer 1

a. Orthophosphoric acid:
Molecular formula: H₃PO₄
Structural formula: 
\[\begin{array}{cc}
\phantom{..}\ce{O}\\
\phantom{..}||\\
\phantom{..}\ce{P}\\
\phantom{..}/\phantom{...}|\phantom{...}\backslash\\
\phantom{.}\ce{OH}\phantom{...}\ce{OH}\phantom{...}\ce{OH}\\
\end{array}\]

b. Sulphurous acid:
Molecular formula: H₂SO₃
Structural formula: 
\[\begin{array}{cc}
\phantom{..}\ce{O}\\
\phantom{..}||\\
\phantom{..}\ce{HO - \underset{^{..}}{S} - OH}\\
\end{array}\]