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Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts2 Marks
Question
A salt X when dissolved in distilled water gives a clear solution which turns red litmus blue. Explain the phenomenon.
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Answer

Salt X is like sodium carbonate, Na2CO3, which is made from a strong base and a weak acid. On dissolving in water, salt X gets hydrolysed to form some strong base and some weak acid. The strong base thus formed makes the solution alkaline which turns red litmus blue.

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