What are the four important steps needed to obtain accurate meting points on a M

Question

What are the four important steps needed to obtain accurate meting points on a Mel-Temp? Grind the sample some. Grind the sample into a fine powder. Put the smallest amount you can see in a capillary tube. Fill the capillary tube with about 3mm of powder 0Set the voltage to rise quickly to 20 degree below the expected temperature, then re adjust so the temp rises at 2 degree per minute. 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. Record the temp at which liquid first appears and the temp at which the last crystal disappears. Record the temp at which the sample completely melts and the temp when it boils.

Explanation / Answer

yes all are correct

before starting experiment ensure the substance is

Careless preparation of a sample is the leading cause of inaccurate and
irreproducible results in melting point determinations

The melting point of a substance is the temperature at which the material
changes from a solid to a liquid state

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