Is CaCl_2 more soluble at high temperatures or low temperatures?

Question

Hint: When CaCl_2 dissolves, the process if exothermic.

Answer 1

The process is probably exothermic because of the hydrates being formed when CaCl2 dissolves in water. That is irrelevant.

Typically any substance will be more soluble the hotter the water is. The reason is that the thermal energy of the water will be greater and allow it to overcome the lattice energy of the crystals if hot enough.

Answer 2

i might upload to Morbius' factor that there is comparable data from around the area. surely whilst we are consistently instructed that there isn't any such ingredient as situations community to Greenland, that Greenland is a bellweather for the international climate, the case for hotter medieval temperatures shouldn't relax on Greenland on my own - - and nor has it. Tree strains have been larger in mountain ranges around the area, droughts worse in areas as far aside because of the fact the yankee Southwest and Kenya, and wild besides as farmed plant life grew at larger elevations and chillier latitudes than is the case at present. Glacial retreat interior the Alps is revealing artefacts from medieval circumstances besides as previous heat epochs. Sea sediment data shows warmer temperatures. in basic terms tree jewelry could be seen inconsistent - yet tree jewelry are undesirable proxies for 3 motives: (a million) because of the fact the data is rather narrow - one or 2 timber may well be used to estimate the climate of a finished continent for as long as a century; (2) because of the fact there are a number of different aspects that influence tree strengthen, and (3) because of the fact it has those days been chanced on that, all different issues being equivalent, tree jewelry do no longer in basic terms shop widening with temperature - there's a temperature point previous which the tree jewelry do exactly no longer proceed to widen. To the quantity samples have been as much as date for the 1980-2000 era, whilst all of us comprehend it warmed, the tree jewelry are not any wider than they have been interior the Nineteen Seventies.

Answer 3

doesn't matter actually. the solubility is greater at higher temps just as long as you don't hit the bp of the solution.