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Above 70°C, what other compounds besides ammonia (NH3) have a lower solubility than that of potassium nitrate (KNO3)?

User Rood
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If we based this on the solubility curve on water at normal conditions, aside from ammonia or NH3, the solubility line of Ammonium Chloride (NH4Cl) is much lower than Potassium Nitrate (KNO3) from temperatures of 30 degree Celsius and beyond.

User Kiru
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