Problem: In each of the following situations, what type of filtration device would you use?
A. Remove powdered decolorizing charcoal from 20mL of solution?
My answer: Filter Aid or Celite (diatomaceous earth)
B. Collect crystals obtained from crystallizing a substance from about 1 mL of solution.
Filter-tip pipette or Craig tube
C. Remove a very small amount of dirt from 1 mL of liquid?
Filter-tip pipette
D. Isolate 2.0 g of crystals from about 50 mL of solution after performing a crystallization?
Buchner funnel
E. Remove dissolved colored impurities from about 3 mL of solution?
Decoloring charcoal
F. Remove solid impurities from 5 mL of liquid at room temperature?
Filter paper
Problem: In each of the following situations, what type of filtration device would you use?
A. Remove powdered decolorizing charcoal from 20mL of solution?
My answer: Filter Aid or Celite (diatomaceous earth)
Your answer may be perfectly ok but I always worry about contaiminating the material with the "other" solid; i.e., in this case whatever filter aid you are using (mascerated paper et al and celite). Would just plain filter paper work as well?
B. Collect crystals obtained from crystallizing a substance from about 1 mL of solution.
Filter-tip pipette or Craig tube
I have had no experience with a filter tip pipette or a Craig tube but I can imaging what they are. From such a small volume you could almost decant the liquid and allow the crystals to dry.
C. Remove a very small amount of dirt from 1 mL of liquid?
Filter-tip pipette
Ok.
D. Isolate 2.0 g of crystals from about 50 mL of solution after performing a crystallization?
Buchner funnel
It would need to be a SMALL Buchner funnel. And 2 g of crystals can get lost on a large sheet of filter paper. Using a regular piece of filter paper and funnel would concentrate the 2 g in the center of the cone. The filter-tip pipette might work ok here too. Most of these answers are personal preferances, of course, but I would not go with a Buchner, even a small one.
E. Remove dissolved colored impurities from about 3 mL of solution?
Decoloring charcoal
This would probably work but you then must address the problem of getting rid of the charcoal. That becomes a repeat of one of the above questions.
F. Remove solid impurities from 5 mL of liquid at room temperature?
Filter paper
good, but this answer doesn't imply the others are not. I was just raising questions about some of them.
A. Remove powdered decolorizing charcoal from 20mL of solution?
Filter Aid or Celite (diatomaceous earth) or just plain filter paper if you want to avoid contamination with other solids and keep it simple.
B. Collect crystals obtained from crystallizing a substance from about 1 mL of solution.
Filter-tip pipette or Craig tube or you could try decanting the liquid and allowing the crystals to dry.
C. Remove a very small amount of dirt from 1 mL of liquid?
Filter-tip pipette would do the trick.
D. Isolate 2.0 g of crystals from about 50 mL of solution after performing a crystallization?
A small Buchner funnel could work, but a regular piece of filter paper and funnel would concentrate the crystals in the center of the cone. Or you could also use a filter-tip pipette.
E. Remove dissolved colored impurities from about 3 mL of solution?
Decoloring charcoal would work, but then you'll have to figure out how to get rid of the charcoal. It's a charcoal-enge.
F. Remove solid impurities from 5 mL of liquid at room temperature?
Filter paper would do the trick, keeping it simple and effective. This answer doesn't imply the others are not good, I was just raising questions about some of them. Let's keep it filter-esting!
Thank you for your feedback and analysis of the filtration devices for each situation. Here are revised answers based on your suggestions:
A. Remove powdered decolorizing charcoal from 20mL of solution?
Using filter paper would work well to remove the powdered decolorizing charcoal from the solution.
B. Collect crystals obtained from crystallizing a substance from about 1 mL of solution.
Decanting the liquid and allowing the crystals to dry would be a feasible method for collecting the crystals.
C. Remove a very small amount of dirt from 1 mL of liquid.
Using a filter-tip pipette would effectively remove the dirt from the liquid.
D. Isolate 2.0 g of crystals from about 50 mL of solution after performing a crystallization.
Using a small Buchner funnel or a filter-tip pipette would work for isolating the crystals from the solution.
E. Remove dissolved colored impurities from about 3 mL of solution.
Decolorizing charcoal can be used to remove the dissolved colored impurities, but the subsequent removal of charcoal must also be addressed.
F. Remove solid impurities from 5 mL of liquid at room temperature.
Filter paper can successfully remove solid impurities from the liquid at room temperature.
A. To remove powdered decolorizing charcoal from 20mL of solution, you can use filter aid or Celite (diatomaceous earth). However, using just plain filter paper could also work, as long as you take care not to contaminate the material with the filter aid.
B. If you need to collect crystals obtained from crystallizing a substance from about 1 mL of solution, you can use a filter-tip pipette or a Craig tube. Alternatively, you can try decanting the liquid and allowing the crystals to dry.
C. To remove a very small amount of dirt from 1 mL of liquid, a filter-tip pipette is suitable.
D. If you want to isolate 2.0 g of crystals from about 50 mL of solution after performing a crystallization, a Buchner funnel can be used. However, it is important to note that a small Buchner funnel would be needed for this volume. Another option would be using a regular piece of filter paper and funnel, which would concentrate the 2 g of crystals in the center of the cone. Additionally, a filter-tip pipette could also work in this scenario.
E. To remove dissolved colored impurities from about 3 mL of solution, decolorizing charcoal can be used. However, you would then need to address the problem of getting rid of the charcoal, which might require using another filtration device, such as a filter paper.
F. To remove solid impurities from 5 mL of liquid at room temperature, filter paper is a suitable choice. However, this answer does not imply that the other options mentioned in the previous answers are incorrect. It is important to consider the specific requirements of each situation and make a decision based on what is most appropriate.