explain why a hot saturated solution of potassium nitrate forms crystals as it cools
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It is bcoz hot solutions dissolve more of salt, thus a hot solution of potassium nitrate has more salt dissolved as compared to the solution at room temperature.
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Answer:
⇒ In nearly every case, hot water can dissolve more salt, especially ionic salts, more than that possible by cold water.
⇒ In most solutions, the higher the temperature, the more substance can be dissolved. As the temperature falls back to room temperature, the solution can't support that much substance to be dissolved anymore, so the substance has to precipitate out of the solution in crystalline form.
⇒ When hot saturated potassium nitrate cools, the amount of salt that can remain dissolved in the solution reduces gradually.
⇒ As this happens, some of the potassium nitrate begins to precipitate out of solution in the form of potassium nitrate crystals.
:)
⇒ In nearly every case, hot water can dissolve more salt, especially ionic salts, more than that possible by cold water.
⇒ In most solutions, the higher the temperature, the more substance can be dissolved. As the temperature falls back to room temperature, the solution can't support that much substance to be dissolved anymore, so the substance has to precipitate out of the solution in crystalline form.
⇒ When hot saturated potassium nitrate cools, the amount of salt that can remain dissolved in the solution reduces gradually.
⇒ As this happens, some of the potassium nitrate begins to precipitate out of solution in the form of potassium nitrate crystals.
:)
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