Class 7 Science Notes : Neutralization
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In this post, we shared some notes on ‘Neutralization’ from Class 7 Science.
Neutralization : When a solution of acid and base is mixed, both of them neutralize each other and a third substance is formed called salt and this phenomenon is known as neutralization or neutralization reaction. The solution formed due to the mixing of a solution of acid and base is neither acidic nor basic in nature. Such solution is called neutral solution.
Salt formed due to neutralization reaction may be acidic or basic in nature. Acidic or Basic nature of the salt depends on the potency of acid and base. Heat is evolved in the neutralization reaction. Reactions in which heat is evolved are called as exothermic reactions. Thus, neutralization reaction is an exothermic reaction.
Example: Hydrochloric acid is an acid and Sodium hydroxide is a base. When a solution of sodium hydroxide is mixed with the hydrochloric acid solution, both neutralize each other and Sodium chloride (common salt) is formed. The reaction mixture becomes hot, as it is an exothermic reaction. The reaction involved in this can be represented as follows:
Sodium hydroxide solution + Hydrochloric acid solution ——> Sodium Chloride Solution + Water Liquid
Sodium chloride is the chemical name of common salt which is used in general.
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