For questions about extracting elements from compounds (metals from ores, et cetera)

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2
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1answer
37 views

Why preform extraction with multiple small portions of solvent as opposed to one large portion

I'm preforming a liquid liquid extraction on a 1 Liter water sample for GC analysis. The procedure calls for 3 extractions with $50~mL$ of $\ce{CH2CL2}$. Would one extraction with $150~mL$ produce ...
5
votes
1answer
89 views

Standard solution and extracted solution : same concentration?

Summary : I am currently testing how a certain type of foam adsorbs HAP, PCB and OCP, and to this end I am depositing some on the foam, then extracting it. To know how much was extracted, I need to ...
1
vote
1answer
52 views

Can lye be extracted from bamboo ash?

I know that the best source of lye is hardwood. A brief search tells me that Bamboo is considered a hardwood of the monocotyledon variety. I've done a lot of searching to find this answer, but I can't ...
2
votes
1answer
183 views

How does one separate ethanol from acetic acid using aqueous extraction?

Would you add in NaOH, deprotonating the acid, and then wash the mixture in water, thereby removing the Na+ and CH3O- ions in an aqueous layer? But then wouldn't the ethanol be dissolved in the water ...
2
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1answer
75 views

Can we extract $KI$ from Lugol solution?

I want to extract the $KI$ component of the Lugol solution, is there a method to do it? If not, how can I make a $KI$ solution?
2
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1answer
647 views

Chemical methods to extract Oxygen from Rust

Let's say I have a large quantity of rust and want to extract the oxygen from it in a way that allows me to collect the oxygen in a container. What chemical process can I use to do this and what ...
6
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1answer
91 views

Can we process waste just by decomposing it to homogenous mass and extracting the elements from it?

I. e., what if we just burn trash completely or dissolve it in acid, get the resulting paste and extract pure chemical elements out of it by applying some physics and/or chemistry to it until no more ...
0
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1answer
49 views

Metal extraction by pyrolysis

There is a process named solar furnace pyrolysis which is used to reduce the oxides of various elements by concentrating solar energy. Oxygen is liberated but an oxide slag is left. $\ce{SiO2 -> ...
3
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1answer
84 views

Help Identifying Chemicals

I was trying to isolate elemental bismuth from pepto bismol (bismuth subsalicylate) using the process seen here but after I added the HCl, instead of getting a pink foamy substance I got a white ...
0
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2answers
160 views

Can caffeine be separated from coffee?

Is there a way to extract caffeine from coffee completely?
0
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1answer
622 views

How to extract pure caffeine from tablets?

I have some caffeine tablets and I want to extract the pure caffeine from the rest of the ingredients (caffeine 200 mg. Inactive ingredients in order are corn starch, dextrose, dicalcium phosphate, ...
11
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3answers
864 views

67 failures at extracting acetaminophen from Excedrin(R)

I have adapted the lab experiment described in this J. Chem. Ed. article for the organic chemistry lab course I teach. In the past year, the first year of implementation, I have had 67 failures (100% ...