Chemistry, 18.01.2020 05:31 ronnie7898
What are the four important steps needed to obtain accurate meting points on a mel-temp?
a)grind the sample some.
b)grind the sample into a fine powder.
c)put the smallest amount you can see in a capillary tube.
d)fill the capillary tube with about 3mm of powder
e)set the voltage to rise quickly to 20 degree below the expected temperature, then re adjust so the temp rises at 2 degree per minute.
f)set the voltage to rise quickly to 20 degree below the expected temperature, then re adjust so the temp rises at 10 degree per minute.
g)record the temp at which liquid first appears and the temp at which the last crystal disappears.
h)record the temp at which the sample completely melts and the temp when it boils.
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What are the four important steps needed to obtain accurate meting points on a mel-temp?
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