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What is the formula for soda water?

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Hint :The chemical formula for soda water is \[H_2CO_3\]. The chemical formula of any compound describes the proportion of each atom present in it. Soda water is also called carbonated water as it contains dissolved carbon dioxide \[\left( CO_2 \right)\]in water.

Complete Step By Step Answer:
 The chemical formula for soda water is \[H_2CO_3\]. This formula indicates that two hydrogen atoms, one carbon atom and three oxygen atoms are present in soda water. Soda water is formed by dissolving carbon dioxide \[\left( CO_2 \right)\]in drinking water under pressure and hence it is also called carbonated water or fizzy water. The expanded structural formula of soda water is illustrated in the following diagram.
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From the above diagram, we conclude that soda water contains carboxylic acid as a functional group. On the above basis, soda water is also called carbonic acid. Carbonic acid is a weak acid as it dissociates partially in water to produce hydrogen ions.
Therefore, the chemical formula for soda water is \[H_2CO_3\].

Additional Information:
Soda water is widely used in beverages especially in whisky and cold drinks. Soda water has both health benefits and harms. For instance, it helps to relieve constipation and decreases the risk of heart disease. In contrast, it leads to increased sugar intake and hence weight gain.

Note :
It is important to note that the chemical formula for soda water is \[H_2CO_3\]. This formula indicates that two hydrogen atoms, one carbon atom and three oxygen atoms are present in soda water. Soda water is also called carbonated water, fizzy water and carbonic acid.