Ethanol Definition and 105 Threads

In ethanol fermetation and especially when baking a bread: "Yeast organisms consume sugars in the dough and produce ethanol and carbon dioxide as waste products. The carbon dioxide forms bubbles in the dough, expanding it to a foam." We learn that ethanol leaves the bread, it escapes the gluten...

Hello everyone, Does iodine specie change after diluting in ethanol 99%? I’m talking about I-, KI or other kinds of of iodine species. Or it stays in I2 form? I’m looking to make 1% I2 molecular iodine ethanol solution from iodine crystals. Would the ratio be 10 g per 1 liter? Thank you all for...

Dear everyone. I wish you all happy and healthy after this Covid pandemic.Last week i used ethanol mixed with raw materials, got the solution ( suppose ethanol + oil + wax +etc ). And I add water to that Ethanol Solution above with ratio 1/1...inside the mixing solution it formed a resin ( slime...

I was buying and studying the label on a bottle of alcohol spray and a bottle of liquid alcohol. Their ingredients were Ethanol(Alcohol) 75% and isopropyl alcohol(75%) respectively. Is there any difference?

I think the answer is D because both molecules can hydrogen bond with their OH groups, but the C=O bond in ethanoic acid is polar and contributes to dipole-dipole interactions. The solution says B is the correct answer, because ethanoic acid molecules strongly hydrogen bond so that most...

from table the standard enthalpy of ethanol is ##\Delta H°=-277 \frac{KJ}{mol}## the grams of ethanol are ##0,002 cm^3*0,79\frac {g}{cm^3}=1,58*10^{-3}g## and the moles are ##\frac{1,58*10^{-3}g}{(24,02+16,00+6,06)\frac g {mol}}= 3,43*10^{-5}##mol By proportionality, having already the...

Why is the standard density of water given at 4°C while the density of ethanol is generally given at 20°C?

I first found the partial pressure of ethanol at 70 degrees using Antoine coefficients: Coefficients: A 7.68117 B 1332.04 C 199.2 Equation: And found a partial pressure of 0.7 bar...

Hello everybody, I'm designing a gas pressure feed system for a hydrogen peroxide - ethanol rocket engine, and after analyzing the devised injection plate, I noticed it is very sensitive to the propellants' pressure drops and discharge coefficients. Once the plate is manufactured, the only...

If we put NaOH in water then it disassociates into ##OH^{-}## ions(hydroxyl ions) but if we put ##C_2H_5OH## in water it does not disassociates into ##OH^{-}## ions. What is the reason that ##NaOH## disassociates into ##OH^{-}## ions(hydroxyl ions) whereas ##C_2H_5OH## does not disassociate...

Hello, I was doing some research on enthalpy of water-ethanol mixtures at different ratios, and when looking at all the information graphed, I don't understand why it produces the trend line it does. Why doesn't it produce a 'quadratic' trend line? Shouldn't having a 10:90 water-ethanol exert...

Hello, I am researching about fuel cells that use Ethanol as a fuel, because I want to buy a equiptment of approximate 5 Kw (Electric) that uses Ethanol as a fuel for electric generation in anyplace, where yet there is not supply of electrical Energy by wire. Have you heard anything about this...

Why is ethanol less dense than water if ethanol has a larger molecular weight. I think i heard it's something to do with water molecules being closer to each other. Why is this?

I have an idea that should work but I need some accurate numbers. If i mix 1 gallons of gasoline with 1 gallon of water then let is separate i should get approx 90% gas and 110% water that contains the alcohol. I think I can use less water but don't know how much less, 1 pint, 2 pints, 3...

I have been on a project for awhile now and it has to do with production of bio ethanol production from biomass,and also how to add water in ratio 60:40. i.e ethanol will be 60% while water will be 40% without separating. I have tried to mix water with ethanol in this ratio but it keeps...

Hello chemists, need some help here. I'm trying to calculate the power output of a certain otto cycle using different fuels, specifically gasoline, ethanol and different combinations of the two like 85% ethanol and 15% gasoline or 50% ethanol and 50% gasoline. However I have found it difficult...

Homework Statement Hi, I need someone to help me with this question. I tried to find the answer for two weeks I could not finde it. Anyone with the required experience can help! I will be so grateful. Question: A shell-and-tube heat exchanger is to act as a condenser: saturated ethyl alcohol...

What happens to ethanol vapor in an enclosed space like a room? Does it end up dissolving, or accumulating somewhere like the floor or towards the ceiling? If it does dissolve how long does it take?

Homework Statement Why is ethanol a bad choice for recrystallization of phthalic acid? 2. The attempt at a solution I know phthalic acid is very soluble in water, so water is a great candidate to recrystallize phthalic acid. I also know water and ethanol are not miscible. But I don't know how...

I am doing a lab and we get silver epoxy resin on our double layered graphene sample where we didn't want it. We can take off the silver paint using ethanol but worry it may destroy the thin layer. Will ethanol be okay to use? Are there any suggestions on what to use?

Hey Everyone, I'm having trouble detecting my drug dissolved in ethanol using UV-Vis spectroscopy. The peak absorbance of the drug is at 240 nm while the peak absorbance of the ethanol seems to be around 190 nm. Are these peaks too close to each other to get an accurate measurement? In the...

Hello everyone, (Hope this is the right place to post this) I am wondering, and have for a while, if there is any "real" answers, as to why some people report much lower fuel economy running ethanol mixed gasoline fuel. Math says, that ethanol fuel is lower in BTU's than gasoline, so taking...

Homework Statement Ethanol evaporates in a 10 x 20 x 50 ft3 room. Air is initially dry at a temperature of 30 °C and 765 mmHg of pressure. a) If the partial pressure of ethanol after vaporization is 40 mmHg, how many pounds of ethanol evaporated? b) The same air is compressed until it reaches a...

I'm curious, in many flavors used in food (such as vanilla extract and other "natural flavors"), ethanol is used as a solvent to extract the flavors. Is this ethanol synthetic ethanol, or do companies normally get it from the wine/beer industries?

I'm testing Ammonium Bicarbonate in a fermentation process. Is it possible for Ammonium Bicarbonate to 'salt out' Ethanol? Compounds such as Sodium Carbonate and Ammonium Sulfate are able to salt out ethanol.

I was wondering, if ethanol is used in a food, as it commonly is with food flavorings (as a solvent), and that food is then dried out such that It is made into a powder or cereal or something, does all the ethanol completely evaporate? I know ethanol is very volatile and has a low boiling...

Hello The lower flammability point of ethanol is 3.5% v/v. How can I work out the max volume of ethanol in a specified space to be lower than the flammability point Eg If I have a 100l vessel 3.5% will be 3.5l of vapour in that 100l vessel that will make it ignitable - how can I convert 3.5 l of...

Why heat is generated when ethanol is mixed with water? Please also explain why the existing hydrogen bond of water disintegrated to accommodate ethanol molecule?

Hi, Does anyone have a dielectric function for ethanol or a paper where I can find it ? Thanks

Is ethanol basic or acidic? It has an -OH group... but that does not necessarily mean basicity. How does ethanol react in water? Does it gain a proton, does it lose one, or does it lose the hydroxyde...?

So I've read lab grade ethanol is dangerous, and so is alcohol made at home that is distilled because of methanol. My question is, if I used Vodka from the LCBO and distilled it at a temperature around ~78C, would 1-2 shots be safe to drink? I also understand that there is small amounts of...

Hi, I've recently made some very budget homemade 'beer', butt I'm wondering is there an easy (doesn't have to be accurate) way to determining ethanol and methanol content. any help appreciated.

Would this mixdure be equivalent in performance and fuel economy as 95 octane gasoline? Any possible damages to the engine if I try this mixdure? Br. Vidar

Homework Statement Explain the difference in the following properties of dimethyl ether and ethanol: 1) Solubility in water 2) Rate of evaporation Homework Equations The Attempt at a Solution 1) Due to the oxygen being bonded to 2 carbon atoms none of the hydrogen atoms in the...

Hi, I'm doing a lab at home on photosynthesis for biology, in which I have to boil leaves in ethanol, and I have a few questions about safety for this. First of all, is it at all safe to actually boil denatured alcohol/ethanol, especially where people might inhale it? And depending on how safe...

Hi everyone! So, something sort of weird happened in analytical lab and I was wanting some guidance. I was trying to determine the ethanol concentration in a 4 Loko, a red wine, and a beer through acid/base titration. I pipetted a little bit of a diluted alcohol sample into a small beaker and...

Hey, How do you know how many hydrogen bonds ethanol molecules will form with each other? I know there are 3 sites where H bonds could form (2 lone pairs on oxygen and the hydrogen) but with something like hydrogen fluoride, each molecule only forms 1 H bond on average so shouldn't something...

If you have a tank of water then the speed of sound is 1482 m/s. If you add ethanol, the speed of sound increases. This seems to be pretty linear with the % concentration of ethanol. why does ethanol (or propanol) increase the speed of sound? thanks

Homework Statement Using the density of ethanol at 24 degrees Celsius how would I find the %/volume? I can find lots of places that have 20 or 25 degrees but I don't know where to find something referring to 24 degrees? Homework Equations The Attempt at a Solution I have to...

I recently saw a few videos on Youtube of people making a reaction by putting chlorine and alcohol together in a bottle. For the life of me I can't figure out why that reaction would work, and I wondered if anybody could give me an equation. Thanks.

Can alcohol (ethanol) remove or destroy dishwasher liqiud?!? hello friends..please answer me on this question .. if there was a little dishwasher liquid on skin with and contacted with some alcohol on it,and if alcohol mixed with dishwasher can it destroy or remove dishwasher?i ask this...

I have just done a lab on measuring the change in volume of an ethanol-water mixture. One of our tasks is to use the intercept method to determine the specific volumes of both the water and ethanol components at certain concentrations using a tangent line. I have the tangent line at 50%...

Homework Statement what is the purpose of adding ethanol in step 5 in the following description? http://www.creative-chemistry.org.uk...s/N-ch5-08.pdf Homework Equations The Attempt at a Solution Does adding ethanol make the liquid phase (which is now a homogenous mixture) less...

Homework Statement 1) What is the mass of 100% Ethanol? 2) How much ethanol would be expected from 18% glucose solution? 3) What else will be generated? How can we calculate this amount? Given: Fermentation Equation: C6H12O6(aq) + 2C2H5OH(aq) + 2CO2(g) + Heat...

Homework Statement How would I relate the molecular mass of ethanol (46.07 g/mol) to its formula (C2H6O) and indicate how much a mole of ethanol would weigh? Homework Equations The Attempt at a Solution

Homework Statement Ok, I have a volumetric flask filled with 67ml of ethanol and 36.38ml of water to make up 100ml of solution. My experiment was to find out how temperatue affects volume contraction. Part of my analysis was to justify how much volume contracion changed due to volume, a...

Is a hydrogen on an ethanol more or less positive than on a water molecule. I think the hydrogen is more positive on a water molecule, but I still don't understand why? Could someone help me figure this out... please and thank you :wink:

1. Homework Statement a beaker contains 200mL of ethyl alcohol at 22 C degrees. what is the minumum amount of energy that must be removed to produce solid ethyl alcohol.. the melting/freezing pt is -114 C degrees Latent heat fusion = 1.09x10^5 density is 790kg/m^3 specific heat capacity...

Haven't taken a course in distillation in a long time and now myself and some others are working on getting a fuel ethanol still going and wanted to do the calculations before we moved forward. We have a beer that is 12% alcohol and reaching a purity of 90% EtOH in the distillate. The mass...

In a textbook, HCl is said to remain as molecules in liquid ethanol. However, I still wonder whether HCl dissociates in ethanol to give H+ and Cl- ions. I think that as ethanol contains an OH group which is polar, ethanol molecules are capable of breaking the bond H-Cl in a manner similar to...