What is meant by the term "mixed melting point"?

Answer

"Mixed melting point" is a technique used to identify chemical compounds. It is particularly used for organic compounds, where a sample with a known identity and melting point is mixed with an unknown purified sample to determine the melting point.

Glass capillaries are used to determine the mixed melting point. An equal amount of the unknown and known substance are mixed and placed in one capillary. The two substances are also placed in separate capillaries. All three capillaries are heated simultaneously in the melting point apparatus. The melting point of the capillary with the mixed substances should not differ by more than 4 degrees Celsius from the melting point of the substances placed in separate capillaries.

Q&A Related to "What is meant by the term "mixed melting point..."
The temperature at which a solid starts turning into a liquid.
http://wiki.answers.com/Q/What_is_meant_by_melting...
The melting point of carbon is 3500 degrees Celsius or 6332 degrees Fahrenheit. The symbol for carbon is C. Carbon has an atomic number of 6.
http://www.ask.com/web-answers/Science/Chemistry/w...
One key purpose of a melting point is to observe the characteristics of an unknown substance. This can help to give clues about the composition of the materials, or at minimum, provide
http://www.ehow.com/info_8744427_purpose-melting-p...
Nitrogen, which is an atmospheric gas (and the most common one) melts at -210.00 °C, -346.00 °F, or 63.15 K. Cold! Use the link below for more information on nitrogen.
http://wiki.answers.com/Q/What_is_the_melting_poin...
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