Same chapter3 marksDifficulty: Medium
The solubility of potassium nitrate at 30 °C is 45 g per 100 g of water. What mass of the salt will saturate 250 g of water at that temperature?
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3 marksDifficulty: Medium
Distinguish between a saturated, an unsaturated and a supersaturated solution.
Original Khojo Papers practice question — not from a past board paper.
Answer
A saturated solution has dissolved as much solute as it can hold at that temperature and can dissolve no more. An unsaturated solution can still dissolve more. A supersaturated solution holds more than the saturation amount, is unstable and deposits the excess as crystals when disturbed or seeded.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A saturated solution can be made unsaturated simply by heating it.
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