4. Give two points of difference between an acid and a base
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An acid is a substance that produces hydrogen ion (H+) as the only positive ion when mixed with water. A base is a substance that produces hydroxyl ion (OH–) as the only negative ion when mixed with water. An acid is a species that can release/donate a proton to another species.
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Explanation:
Definition. Acids are proton donors/ electron pair acceptors/ that are able to increase the H + ion concentration in an aqueous solution.
pH Value. Acids have a pH value <7.
Colour Changes in Litmus Paper. Acids turn blue litmus paper into red.
Formation of Salts. Acids react with bases to form salts in an aqueous medium.
Taste. Acids taste sour.
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