Question

What are simple acid anhydrides? Give examples.

Answer 1

Hint : In order to answer this question, first we will describe the components of acid anhydrides to make the further explanation convenient to understand. And then we will also give examples of the reactions of simple acid anhydrides for the formation of different acids.

Complete Step By Step Answer:
Acid anhydride are those molecules that can create acidic solutions in water.
Let’s remember some basic concepts.
Acids:- These are the compounds in water that are ready to contribute hydrogen ions.
Bases:- These are the compounds formed when water contains hydroxide ions.
Anhydride is a chemical compound that signifies "without water." It is a chemical compound that is created by removing water from another substance. When anhydride reacts with water, it forms a base or an acid.
An acid anhydride is a non-metal oxide that, when reacted with water, produces an acidic solution. It is a functional group in organic chemistry that consists of two acyl groups joined by an oxygen atom. Non-metals that can react with water are known as Acid anhydrides, but non-metals that can not react with water are not known as Acid anhydrides.
As a result, we can deduce that all acid anhydrides are non-metals, but none of the non-metals are acid anhydrides. Carbon monoxide, for example, is not an acid anhydride even though it is a carbon oxide since it does not react with water.
Now, let’s discuss some examples of the reaction of it.
$*$ Formation of Carbonic acid:-
Sulphuric acid is formed when carbon dioxide combines with water. This is how the chemical equation will look.
${\mathbf{C}}{{\mathbf{O}}_{\mathbf{2}}}\left( {\mathbf{g}} \right) + {{\mathbf{H}}_{\mathbf{2}}}{\mathbf{O}} \to {{\mathbf{H}}_{\mathbf{2}}}{\mathbf{C}}{{\mathbf{O}}_{\mathbf{3}}}({\mathbf{aq}})$
Carbon Dioxide is a non-metal that reacts with water to generate ${H_2}C{O_3}$ (Carbonic acid), which is acid because it donates hydrogen. Acid rain is caused by this process. It also has a significant impact on the pH of streams, rivers, and oceans. As seen in the equation above, more $C{O_2}$ in the air means more carbonic acid is created, which is hazardous to life. This is the biggest issue we are dealing with right now.
$*$ Formation of Sulphuric acid:-
Sulphuric acid is formed when sulphur trioxide combines with water. This is how it can be explained chemically.
${\mathbf{S}}{{\mathbf{O}}_{\mathbf{3}}}\left( {\mathbf{g}} \right) + {{\mathbf{H}}_{\mathbf{2}}}{\mathbf{O}} \to {{\mathbf{H}}_{\mathbf{2}}}{\mathbf{S}}{{\mathbf{O}}_{\mathbf{4}}}({\mathbf{aq}})$
Sulphur trioxide gas then combines with water to generate sulphuric acid. Sulphur trioxide is formed when sulphur dioxide in the air combines with oxygen. Acid rain happens when it reacts with water during a rainstorm. These have extremely negative environmental consequences.

Note :
An acid anhydride is an acidic oxide that interacts with water to generate an oxyacid (an inorganic acid that contains oxygen or carbonic acid) or with a base to form a salt in inorganic chemistry.