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Answer variants:
Sodium carbonate or Washing soda \(Na_2CO_3 . 10H_2O\)
Acidic conditions
Acids dissociates into hydroxyl ions in an aqueous solution.
1. Under what soil condition do you think a farmer would treat the soil of his fields with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?
2. Name the sodium compound which is used for softening hard water.
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