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Question
Answer the following question.
Identify the acid and the base from which sodium chloride is obtained. Which type of salt is it? When is it called rock salt? How is rock salt formed?
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Solution
NaCl is obtained by the reaction between NaOH and HCl.
\[\ce{HCl + NaOH->NaCl + H2O}\]
NaCl is a neutral salt. It is known as rock salt in crystalline form. Rock salt is simply crystallized salt, also known as halite. It is the result of the evaporation of ancient oceans millions of years ago. Sometimes, pressure from deep inside the Earth forces up large masses of rock salt to form salt domes.
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