Why is the chemical formula for vinegar CH3COOH what it is?
2017年2月12日 · The short answer is that CH 3 COOH indicates (by convention) that this compound has both a methyl group and a carboxylic acid group. (The group COOH is generally understood to be the C(O)OH group or C(=O)OH where the double bond "=" and the parentheses are implied.) Note that the organic acid in vinegar is acetic acid, but acetic acid is NOT ...
home experiment - Most efficient way to purify household vinegar ...
2016年5月9日 · Some experimental data after a 4 liter jug of 5% distilled white vinegar accidentally froze at -25°C: The first 0.5 liter to melt out had an acetic acid concentration of about 13%, substantially above the starting concentration, and a pungent vinegar smell. The next 1 liter to melt out had an acetic acid concentration of about 7%.
Using acetic acid to make vinegar - Chemistry Stack Exchange
2023年10月1日 · But dilution of food grade acetic acid to produce vinegar is feasible and often done. The islamic restriction on brewing (which prohibits consumption of alcohol and naturally brewed vinegar) has led to the availability of "non-brewed condiment" which is, essentially, industrial acetic acid diluted to food-safe levels.
everyday chemistry - How can I make vinegar more concentrated ...
The acetic acid has a melting point of 16°C, while water has 0°C. Therefore, when placed into a freezer, the acetic acid will freeze first, not the water. So once the solution freezes, separate the liquid (it contains more water than acetic acid) and keep the …
Acetic Acid % in vinegar? Given average molarity of acetic acid
2018年10月16日 · The stockroom claims the percent acetic acid in vinegar to be $2.0\%$. The density of vinegar is $\pu{1.106 g {mL}-1}$. Using average molarity given ($\pu{0.2844M}$) calculate the mass percent acetic acid in vinegar for comparison to the stockroom claim. Not sure how to approach the problem but this is what I've done:
everyday chemistry - Concentrating acetic acid from vinegar
Yes, you are freezing out acetic acid, which has a melting point of $\pu{17^oC}$ and your freezer is probably on the order of $\pu{-10^oC}$. Your plan to filter the solid acetic acid should give you very concentrated acetic acid, which could be a safety hazard. I would read this and this before planning how to proceed. You will probably want to ...
reaction mechanism - Does the acetic acid in vinegar oxidize ...
2024年4月5日 · It smelled fine. I did a bit of research and saw that in certain light and at (very) high temperatures, acetic acid does oxidize. Atmospheric acetic acid oxidizes due to OH radicals in air. The concentration of acetic acid in vinegar is pretty low (4-18%). At the lower range, it doesn't seem like there's enough acetic acid to use up that much ...
Acetic acid freezing distilation - Chemistry Stack Exchange
2012年11月5日 · E = Solid solution of water in acetic acid ; F = Solid solution of acetic acid in water PLUS Solid solution of water in acetic acid ; A mixture of acetic acid and water that is approximately 72% acetic acid is cooled until it begins to freeze (solid blue vertical line), which happens around 2 o C. The phase changes from A (liquid solution) to C ...
What does the amount of acetic acid in vinegar depend on?
The pure Acetic acid (Ac) crystalizes to a solid at less then 16.7 C. (2). You can imagine how easy it is to make any concentration you want, when you have a powder to mix with water = distilled vinegar. That means that in that 3.8 L bottle only about 270g is actually Acetic Acid. However because Acetic Acid is a weak acid in water with a pH of ...
How do i get acetic acid from vinegar? - Chemistry Stack Exchange
2020年9月30日 · Acetic acid is difficult to separate from water by conventional distillation or rectification because of the close proximity of their boiling points. Acetic acid can be readily separated from water by using azeotropic distillation. Typical examples of effective agents are ethyl n-valerate and 4-methyl-2-pentanone.