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Continue reading the main story. THE FACTS Nothing but time can cure the common cold, but a simple cup of salt water might ease the misery this winter. A sore, itchy throat and respiratory congestion are some of the more common symptoms of a cold, and gargling with salt water seems to help for several reasons.ccording to the Mayo Clinic, for best results, dissolve half a teaspoon of salt in a full glass of warm water and gargle the solution for a few seconds before spitting it out. Adults who want a more palatable remedy against cough and sore throat can try mixing warm water with lemon and honey. No need to spit it out.
While many salts do have higher solubilities in hot water compared to cold water, some salts actually have less solubility in hotter water. We can report the solubility of a chemical at various temperatures. For example, the solubility of KBr in water at 25 o C is 64 g/100 g water.