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a salt is a...
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A salt is a chemical compound that is formed by the reaction of an acid and a base. Salt is a neutral compound that is formed when the positively charged cation of a base combines with the negatively charged anion of an acid. For example, sodium chloride (NaCl) is a salt that is formed when the positive sodium ion (Na+) from the base NaOH combines with the negative chloride ion (Cl-) from the acid HCl.