Water softening by Clark’s process uses - DASH

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Water softening by Clark’s process uses

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Step 1: Understanding Clark's Process Clark's process is a method used to soften hard water by removing calcium and magnesium ions. Step 2: Chemical Used In Clark's process, calcium hydroxide, commonly known as lime, is added to the water. The chemical reaction is as follows: $ \text{Ca(OH)}_2 + \text{Ca(HCO}_3\text{)}_2 \rightarrow 2\text{CaCO}_3 + 2\text{H}_2\text{O} $. This reaction precipitates calcium carbonate, which can be removed from the water, thus softening it. Step 3: Conclusion The correct answer is calcium hydroxide (lime).

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