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You will get an impure, unknown result because without knowing what's in there you don't have any idea what it's gonna do until it does it. Sorry for the bad answer but it's as good as I can give.

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13y ago

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Which methods is used to obtain pure copper sulphate from impure sample and how?

One method to obtain pure copper sulfate from an impure sample is by recrystallization. In this process, the impure sample is dissolved in water, and then the solution is heated and slowly cooled to allow pure copper sulfate crystals to form. These crystals are then filtered out and dried to obtain the pure compound.


Why is it important to determine the melting range of the impure and recrystallized sample of vanillin?

The melting point is an indication of purity.


What term is used in forensics to describe a sample of unknown origin?

The term used in forensics to describe a sample of unknown origin is "questioned sample."


What is a flame tested used for?

To identify an unknown sample by its emission spectrum


How would a contaminated unknown sample affect the accurate identification of the unknown?

A contaminated unknown sample could potentially introduce foreign material that may interfere with the identification process. This contamination could lead to misleading results or hinder the ability to correctly identify the unknown sample. It is important to ensure the sample is pure and free from contamination for accurate identification.


What is meant by a mixed melting-point determination?

"Mixed melting point determination" is a term used in chemistry. Organic substances have a fixed temperature at which they liquify. If a chemist wants to determine the nature of an unknown substance, he can determine it by these means. If the unknown substance does not melt at the usual temperature, it can be said to be impure. If the chemist has two unknown substances and wants to determine what they are, he may mix equal parts of each and start the liquification process. If the combination melts at the usual temperature, the chemist can say that both are the same. If the chemist wants to determine the nature of an unknown substance, he may mix a fixed amount of a known substance with a fixed amount of an unknown substance, it can be estimated, what the unknown substance is.


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Under coverage may result from a?

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Why do you need to perform each of the tests on a known sample as well as on your unknown sample?

it is need so as a control.


Is the acid fast stain result positive or negative for the sample?

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Is the acid fast staining result positive or negative for the sample?

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Why is it important to determine the melting ranges for the impure and recrystallized samples of vanillin?

Determining the melting ranges of impure and recrystallized samples of vanillin is important because it helps assess the purity of the compound. A narrower melting range for the recrystallized sample indicates higher purity, while a broader range for the impure sample suggests the presence of impurities. This information is crucial for quality control and ensuring the vanillin is suitable for its intended use.