Question

Give an example of a chemical reaction for the following situation: A gas evolved.

Answer 1

Hint :At the very first let us get some idea about the chemical reaction. A chemical reaction occurs when one or more substances, known as reactants, are converted into one or more different substances, known as products. The constituent atoms of the reactants are rearranged in a chemical reaction, resulting in the formation of various substances as products.

Complete Step By Step Answer:
Let us talk about Gas evolved reactions. A gas evolution reaction is a chemical reaction that produces a gas, such as oxygen or carbon dioxide, as one of the end products. When the gases produced are toxic or explosive, gas evolution reactions may be carried out in a fume chamber.
According to the case, when 'baking soda' and 'vinegar' are mixed, chemical changes occur. Following that, bubbles of 'carbon dioxide' gas, as well as another material, are formed. Since the reaction between baking soda and vinegar takes two stages, the overall process can be described using the following word equation: The combination of baking soda (sodium bicarbonate) and vinegar (acetic acid) produces acetate ion + carbon dioxide plus water plus sodium ion
Baking soda(Sodium hydrogen carbonate)+Vinegar(Acetic Acid) $ \to $ Sodium acetate + Carbon dioxide +water.
Can write above reaction like this also:
 $ NaHC{O_3}\left( s \right){\text{ }} + {\text{ }}C{H_3}COOH\left( l \right){\text{ }} \to {\text{ }}C{O_2}\left( g \right){\text{ }} + {\text{ }}{H_2}O\left( l \right){\text{ }} + {\text{ }}N{a^ + }\left( {aq} \right){\text{ }} + {\text{ }}C{H_3}CO{O^ - }\left( {aq} \right) $
 $ NaHC{O_3} + H{C_2}{H_3}{O_2} \to Na{C_2}{H_3}{O_2} + {H_2}O + C{O_2} $ .

Note :
The formation of a gas is a sign that chemical changes are taking place. Change can be seen in the gas bubbles that form when an antacid tablet is dropped into water. The substances generated during chemical reactions, on the other hand, do not easily revert to their original state.