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What is an impure substance?

Answer

it is a substance that has been contaminated with other materials that differ in in chemical composition with it.
Q&A Related to "What is an impure substance?"
Here are a few impure substances: excrement, mucus, tears, large in...
http://www.chacha.com/question/what-are-two-impure...
With a pure substance we know exactly what is in it. If it is an element, then all the atoms are the same. If it is a compound, then it has a formula and we know exactly which atoms
http://answers.yahoo.com/question/index?qid=200805...
The history of development for the drug substance should be included in 3.2.S.2.6. A description of batches and the result of batch analyses should be included in 3.2.S.4.4. The history
http://www.fda.gov/RegulatoryInformation/Guidances...
Explore this Topic
If a substance in a mixture is preponderant--, if the amount far exceeds the amounts of the other substances in the mixture it is usually called an impure substance ...
The melting point of an impure substance will always be lower than that of a pure substance. It will also have a larger range than that of a pure substance. ...
When observing a mixture vs. an impure substance, simply look at the composition of each substance. A mixture is a combination of at least two pure substances. ...
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