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what is the melting point of potassium chloride?
Potassium chloride is a common salt with a face-centered cubic crystal structure and a lattice constant of roughly 6.3 angstroms. KCl has the same chemical structure as many other halide salts, with closely packed atoms of larger chlorine ions and smaller potassium ions filling in gaps, known as octahedral voids, between them.
KCl is a water-soluble salt that can be incorporated into a solution to help with the treatment of potassium deficiency, including thiazide diuretics and corticosteroids used in cases of excessive vomiting or diarrhea, or diets low in potassium; in the prevention or treatment of cumulative digitalis poisoning; and in lethal injections. It is also widely used as a flux in oxy-fuel welding machines.
The melting point of KCl at 1 bar is 1042 +- 2 K (Figure 3a), which was bracketed by the latent heat ledges observed upon heating and cooling. Ionic conduction measurements at 1 bar revealed a steep increase of the ionic current with temperature. This was the first derivative of the current-temperature relation.
Hygroscopic behavior of KCl mixed with oxalic acid and levoglucosan
A ternary mixture of equal mass of KCl, oxalic acid and levoglucosan, in a mass ratio of 1:3, showed hygroscopic growth below 70% RH, accompanied by prompt deliquescence transitions at high RH. Both ZSR predictions and AIOMFAC model predictions exhibited fair agreement with the measurement results, with a slight deviation in dehydration predictions at lower RH.