2006-12-11 17:24:50 · 3 answers · asked by S 4 in Science & Mathematics ➔ Chemistry
Also, When measuring a melting point, why is it necessary to raise the temperature very slowly in the vicinity of the melting temperature?
2006-12-11 17:25:48 · update #1
When measuring the melting point, you must raise the temp slowly because the melting points are ALWAYS a range. So you need to record the start of the process and the end. If the temp is rising too quickly, by the time you record the start of the melt, you have missed the end of the melt.
2006-12-11 17:31:42 · answer #1 · answered by Vaynthe 3 · 2⤊ 0⤋
If you put a hot object on a balance, it is producing a column of hot air above it, which is less dense than the surrounding air. So your balance reading will be inaccurate.
2006-12-11 18:27:51 · answer #2 · answered by Gervald F 7 · 2⤊ 0⤋
the biggest problem , as I bear in mind, replaced into water absorption. I took analytic chemistry 40 years in the past, and as I bear in mind, because the article cooled, it took on water and therefore weighed extra You had to allow it "settle", attain a level the position the upward thrust in water weight replaced into insignificant.
2016-11-25 22:14:49 · answer #3 · answered by ? 4 · 0⤊ 0⤋