All Questions
Tagged with extraction experimental-chemistry
24
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How does a conc. electrolyte solution extract water from a organic phase like diethyl ether or ethyl acetate?
In organic chemistry, often, during the last steps of a workup we use concentrated brine solution (NaCl) to "extract" the water from the organic layer, especially when we have an organic ...
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2
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1
answer
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What are the hydrodynamics behind a Soxhlet extractor?
So I'm trying to wrap my head around the physics of how a Soxhlet extractor works, not the chemical, solvent and chemical components part, but rather the physical, hydrodynamic, siphoning part : why ...
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Are there any tests which distinguish between triglycerides and polar lipids/impurities that can be conducted in a high school setting?
I am currently writing a research essay about using a mixed polar (methanol) and non-polar (heptane) solvent system to extract oil from mango seed kernels. One of the difficulties of using polar ...
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How to determine the iron content of a screw?
In Analytical Chemistry, I was asked to determine the iron content of a screw.
I thought it could be solved in the following way:
Treat the screw with a solution of sulfuric acid or hydrochloric ...
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1
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0
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Primitive Technology - Extract Silica and Sulfur from ash
Given some plant ash containing silica and sulfur, we need to find a way to extract the silica and sulfur using only resources available to a primitive person stuck on an island, with access to a ...
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Last step of nicotine extraction using DCM
After using hydro-distillation method with distilled water and NaOH, separating the extract with dichloromethane, distillate it at 40 °C/104 °F, I'm left with some yellow pale oil.
I'm just wondering ...
4
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1
answer
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When are all cannabinoids infused into grape seed oil using non-decarboxylated, dried plant matter? [closed]
I am unsure which is the correct terminology, infusion or extraction? For all practical purposes I will continue using infusion here. (What is the difference between the two?)
When making the ...
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How to calculate the remaining mass in the mother solution after multiple extractions? [closed]
During an extraction, a solute ($\ce{S}$) will partition itself between the two solvent phases with a partition coefficient ($K$) defined as:
$$\ce{S(solvent 1) <=> S(solvent 2)}$$
$$K = \frac{...
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2
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Chile 2017, One of the Largest Fires in South America: Wood Ash Derivates for Industrial Applications [closed]
Hi: We're a group of people who wants to help people, domestic animals and wildlife recovering from this fire.
Summary:
We're having in Chile one of the largest fires in South American history.
More ...
user40511
3
votes
3
answers
194
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Extracting iron oxide from ceramics waste
In my ceramics class, we use iron oxide in our glazes, but a lot of it goes to waste. We have a bucket full of scrap glaze which contains quite a lot of iron oxide, but is also mixed in with silica, ...
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Role of hydrochloric acid and sodium hydroxide in isolation of citric acid from lemon juice
I'm trying to extract citric acid from squeezed lemons.
After studying the subject, I found a lab manual [1, p. 68]:
ISOLATION OF CITRIC ACID
Reagents:
Lemon juice (ca. $\pu{100 mL}$ – 3 lemons)
$\...
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1
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2
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How to obtain calcium carbonate?
I read calcium carbonate is the main component of seashells and other animals' shells (such as snails), and also limestone. How can I prepare pure $\ce{CaCO_3}$?
Could someone describe the process ...
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1
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How can I isolate glycolic acid from sugarcane juice?
This beginning of a bachelor thesis uses ethylene glycol as a catalyst in the isolation of glycolic acid. I can't find the rest of the article (it ends in the middle of the description) to find out ...
3
votes
1
answer
872
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Oil-water emulsion doesn't separate
I've steam distilled a couple of different powdered seeds/herbs to obtain the essential oils from them.
Somehow some of the extracts won't separate and stay in an emulsion.
I've seen that some fixed ...
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3
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2
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What is purpose of sulfuric acid in iodine extraction?
I am trying to extract iodine from kelp following this guide here. It calls for sulfuric acid, but I don't see what this does do help the reaction. I thought the reaction was simply oxidizing iodide ...
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