Friday
July 25, 2014

Homework Help: Filtration?

Posted by Sheryl on Wednesday, September 27, 2006 at 10:03pm.

Question: While performing a crystallization, you obtain a light tan solution after dissolving your crude product in hot solvent. A decolorizing step is determined to be unnecessary, and there are no solid impurities present. Should you perform a filtration to remove impurites before allowing the solution to cool? Why or why not?

My answer: Since decolorization is not deemed necessary, we can assume that the tan color is due to the desired product and does not need to be removed. There are no solid impurities and if we did a filtration, we could lose some product due to cooling. Therefore, filtering is unnecessary.

How's that?

Sheryl


sounds good to me. You could also introduce impurities (unintended, of course) from the filtration. In some of the work I did we had to make a correction for the trace metals found in filter paper. Ashing the paper simply added the extra trace metals (mostly copper) to the crucible. So we ran blank pieces of filter paper through the procedure, too, and used the average from three to subtract as a blank.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Decolorizing - Question: A compound you have prepared is reported in the ...
Chemistry - Please help me answer this question; The goal of the ...
organic chemistry - a compound you have prepared is reported in the literature ...
Chemistry Help ???? - Experiment - Recrystallization of a solid Purpose in this ...
Filtration - Problem: In each of the following situations, what type of ...
Solvent - Question: A student dissolved 0.30 g of a crude product in 10.5mL (the...
science(chemistry) - When performing vacuum filtration of a solid in an unknown ...
chemistry - consider a crystallization of sulfanilamide in which 10 mL of hot 95...
Chem Urgent Help ? - I have a lab dis monday .. plz someone help .. Lab Title is...
grade 12 chemistry - Solubility equilibrium: is dynamic equilibrium in a ...

Search
Members