more specifically: What is the best reason you can give for why a melting point for a material of known formula does not melt at the temperature it is supposed to? what does this indicate about the material?
2006-10-17 09:45:59 · 4 answers · asked by jli920 1 in Science & Mathematics ➔ Chemistry
Assuming that the melting point is accurate for the local pressure, it probably means that the substance is not pure. If the substance maintains a solid phase above the melting point, it most likely means that the substance is in solution with some other substance. In particular, with metals, even a little bit of a second metal in alloy (a type of solution) with the main metal can cause the melting temperature to rise, and causes melting to happen gradually over a range of temperatures instead of all at once at a particular melting point.
2006-10-17 09:49:06 · answer #1 · answered by DavidK93 7 · 0⤊ 0⤋
Which...substance? Um, i'm notably particular that each physique components have distinctive melting and boiling and freezing factors working example, permit's say you % to chop up the sugar from the water in sugar water you may in all probability boil the water (one hundred levels Celsius) Which leaves the sugar in the back of Sugar would not have a similar boiling element, it is why it is left in the back of.
2016-10-19 21:36:20 · answer #2 · answered by ? 4 · 0⤊ 0⤋
It indicates that the material is not pure, has contaminants or the technician should be fired.
2006-10-17 11:02:12 · answer #3 · answered by Dr. J. 6 · 0⤊ 0⤋
just one reason for that,, your compound is already contaminated and not pure and that can happen if the preparation of your compound is not complete or good or you didnt recrystlize it with solvent or been stored for long time or the container of your chemical was not clean or used messed spatula by mistake
2006-10-17 10:29:42 · answer #4 · answered by source_of_love_69 3 · 0⤊ 0⤋