2007-08-12 05:36:41 · 6 answers · asked by Dimpho T. L. M 1 in Science & Mathematics ➔ Chemistry
Melting point range is very narrow for pure compounds but broadens when impurities are present. Impurities also lower the
temperature at which melting begins to occur.
so drysubstances before taking their melting points....
2007-08-14 23:51:04 · answer #1 · answered by Anonymous · 0⤊ 0⤋
If ample is wet, then some heat is used to change the phase of the liquid to a gas before the solid melts. So that adds some uncertainty tot eh melting point since now you have two phases of matter in the sample.
2007-08-12 12:46:02 · answer #2 · answered by nyphdinmd 7 · 0⤊ 0⤋
If it is soluble in water, the mositure may result in a solution which can be confused with the melting point of the solid, esp. if both are close by.
2007-08-12 12:40:28 · answer #3 · answered by Swamy 7 · 0⤊ 0⤋
Presence of moisture in your sample it will interfere w/ your analysis you will not get a sharp melting point
2007-08-12 12:43:42 · answer #4 · answered by Yheng Natividad 3 · 0⤊ 0⤋
meting point is the teimperature where solid turns into liquid...
solid is something tht doesnt change its shape when put in container....
liquid is something tht takes the shape of an container
2007-08-12 12:43:02 · answer #5 · answered by Nishant P 4 · 0⤊ 1⤋
yes
2007-08-12 12:44:49 · answer #6 · answered by Bob K. 2 · 0⤊ 0⤋