Chemistry
We all know that common salt (NaCl) adds taste and some nutrition to our food. One rainy day, Amaira wanted to add some salt to her meal. When she opened the jar and scooped a spoonful of salt out, she noticed that the salt had become moist and sticky.
(a) Why did the salt become moist ? Explain.
(b) Define deliquescence.
(c) How can we keep the salt dry in our homes during monsoon ?
Water
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Answer
(a) During the rainy season, the air contains a large amount of water vapour (high humidity). Common salt (NaCl), especially if it contains impurities like magnesium chloride, absorbs moisture from the air. This makes the salt moist and sticky.
(b) Deliquescence is the property of certain substances to absorb moisture from the air and dissolve in it, forming a solution.
(c) We can keep the salt dry in our homes during monsoon by :
- Storing salt in an airtight container.
- Keeping it in a dry place.
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