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I do believe that since methanol (CH3OH) is a smaller molecule than ethanol (C2H5OH), and alcohol loses its polarity (and its ability to dissolve polar molecules as well as its own miscibility in water, also a polar molecule) at around 5 carbons or so, then it would follow that perhaps methanol is better at grabbing onto those polar compounds you'd like to extract. Ethanol usually works just fine for long term extraction, and provides a product we can consume.
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Is it better to have a higher yield or a lower yield in chemistry?
This depends on the application; if you need to produce a specific compound a higher yield is of course preferred.
What is the fragrance produced by isoamyl alcohol and butyric acid?
In the more advanced organic chemistry labs, many introduce fisher esterification by using combinations that yield appealing scents to the students. This specific reaction, when run with small amounts of H2SO4 and one of the reactants in excess will yield an ester with a distinct smell - Bananas. Isoamyl acetate is also the pheromone bees use as a natural alarm, be careful Similar reactions are run to yield Pineapple oil (ethyl butanoate from ethanol and butanoic acid) and strawberry oil (methyl trans-cinnamate from trans-cinnamic acid with methanol)
How do you calculate Exit Yield?
Exit yield is used to value at the end of a cash-flow. It gives a capital value that is expected to be an asset after cash-flow ends.
What reactant gives the lowest yield by limiting the amount of product?
A reactant that gives the lowest yield by limiting the amount of product is called a limiting reactant. The limiting reactant will run out, so that only a limited amount of product can be made from the reactants.
What will you get by the extraction of garlic with ethanol?
Garlic (Allium sativum L.) and garlic extracts have therapeutical properties that stem from their sulfur-containing compounds, mainly allicin. The main objective of this work was to compare conventional and "premium" garlic extracts in terms of yield and quality, with the latter being obtained using supercritical carbon dioxide (SC-CO2) as the solvent. Yield ranged between 0.65 and 1.0% and increased with extraction pressure (150-400 bar) at a constant temperature of 50°C. Extraction temperature (35-60°C), on the other hand, had little effect at a constant pressure of 300 bar. Based on yield and quality considerations, the best extraction conditions using SC-CO2 were 35-50°C and 300-400 bar. A yield of 5.5% was obtained by conventional extraction using ethanol as the solvent, but ethanol appeared to be less selective for valuable components than SC-CO2. The use of fresh garlic resulted in extracts that more closely resembled commercial products, possibly because of thermal and oxidative degradation of valuable microconstituents during drying.
What is maximum percentage oil yield in ethanol or methanol?
polarity order of ehanol methanol n-hexane and distilled water
Why does ethanol need to be cold?
To increase yield of DNA
Methanol is combusted to yield 19.5mg of H2O. What is the mass of CO2 produced concomitantly?
The answer is 26,8 mg CO2.
How would the yield of ethanol at equilibrium change if the temperature was increased?
If you raise the temperature, the endothermic reaction will increase to use up the extra heat, therefore producing less percentage yield of ethanol and more of ethene and steam.
How do you extract menthol from mint leaves?
Steam distillation yield mint essential oil. From the essential oil you have two options: Extraction, reduction, and purification. Or you can take the essential oil and perform a re-crystallization. The first would be to take the distillant, dry it, and isolate your essential oil. Then perform an ethanol extraction on it several times to get most of the methanol out. Then NaOH washes to remove random impurities and alkaloids, then you want to dry it again (Na2SO4 would be ideal). Then you rotovap off your dried ethanol solvent. You should have crude methanol. Take this and perform a cold finger sublimation. Scrape your methanol crystals off the cold finger and bam, pure Methanol. Or you can perform a re crystallization, but I'm not exactly sure what solvent you would use. so that would take more research, but I know it can be done.
To maximize equilibrium yield of methanol would you use high or low temperature?
High because a higher pressure is the result of decreased volume and when a decreased volume for the equilibrium mixture is involved, the shift is toward the side with the least amount of mols of gas. 3 for reactants and 1 for methanol so towards methanol
What is the theoretical yield of ethanol?
This question cannot be answered as written. The chemical equation is needed, as well as the masses of the reactants.
Is it better to have a higher yield or a lower yield in chemistry?
This depends on the application; if you need to produce a specific compound a higher yield is of course preferred.
Explain any one method of crop production which ensures high yield?
we can increase the yield in crop production by hybridization . For e.g.: take a plant which is disease free but poor in yield and take another which gives higher yield but is disease prone . by cross breeding them through interverialtale hybridization will give an offspring which is superior to its parents and gives higher yield and disease resistant .
When acetone reacts with hydrazine in ethanol what is formed?
One hydrazine reacts with two acetone to yield two 2-propanol and one nitrogen (gas).
How do you get a better yield of benzil quinoxaline?
add water
What is the EV yield of Pokerus combined with an EV item like the macho brace?
Pokerus + Macho Brace gives an EV yield of 4x normal.
