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What else can I help you with?
Is phenol red a exothermic change?
Phenol red itself is not an exothermic change; rather, it is a pH indicator that changes color in response to pH levels. When it undergoes a change in pH, such as when it interacts with acids or bases, the process is typically not associated with a significant release of heat. Exothermic reactions involve the release of heat during a chemical reaction, which is not applicable to the color change of phenol red.
Are the phenol red broths selective differential or both?
Phenol red broths are primarily differential media. They are used to differentiate between various types of bacteria based on their ability to ferment specific sugars, which results in a color change due to the pH indicator phenol red. While they can provide some selective characteristics depending on the sugar included, their main purpose is to assess fermentation capabilities rather than selectively inhibit certain organisms.
What characteristics of a molecule make it an amino acid?
Being both an amine and an acid, of course.Generally the term is used mainly for a specific type of amino acids... alpha-amino carboxylic acids. However, taurine is also called an amino acid, despite the fact that it's a sulfonic acid rather than a carboxylic acid.(alpha-amino means the amine group is attached to the first carbon after the carboxylic acid carbon itself. In taurine, the amine group is attached to the second carbon after the sulfonic acid group.)
Is Bakelite formed by anionic or cationic polymerisation?
Bakelite is formed through a polycondensation reaction, which is a type of step-growth polymerization, rather than strictly anionic or cationic polymerization. It is created from the reaction of phenol and formaldehyde, typically in the presence of a catalyst, leading to a thermosetting plastic. The process involves the formation of cross-linked structures, characteristic of Bakelite, during the curing stage.
Why are carboxylic acid anhydrides and halides not found in biological systems?
Halides are found in biological systems - most organisms have tons of dissolved chloride ion, and mammals at least have quite a bit of dissolved iodide.Are you asking why biological systems don't have HALOGENS? ?Halides are ions (like chloride, aka Cl-) and halogens are the molecular forms (like chlorine, aka Cl2). ?Halogens and acid anhydrides are toxic to biological systems because they are very reactive, and would halogenate and form adducts on proteins, DNA, etc. ?They are also very reactive and would not exist long in the aqueous environment of a biological system.But fun fact: an enzyme in your thyroid gland (i think called thyroid perioxidase) makes transient amounts of iodine (I2) from iodide (I-) in the synthesis of thyroid hormone. ?But these are very small amounts localized to the thyroid gland, and only transiently.
Why acetylsalicylic acid is not a phenol group?
ASA (acetylsalicylic acid) or Aspirin is synthesised by reacting Salicylic Acid with Acetic Anhydride. During this esterification, the dehydration occurs on the hydroxyl group attached to the benzene ring. As a result, the product no longer possesses the Phenol functional group.
What was carboxylic acid used for?
Rather than there being a substance called carboxylic acid, scientists call the-COOH group that occours frequently in many different compounds the carboxylic acid functional group.
Why does the alkali-catalysed hydrolysis of an ester produce a sodium salt rather than a carboxylic acid?
The alkali-catalysed hydrolysis of an ester results in the formation of a carboxylate salt (sodium salt) rather than a carboxylic acid due to the strong basic conditions provided by the alkali. The alkali (such as sodium hydroxide) deprotonates the carboxylic acid product, converting it into a carboxylate salt.
Can salicylic acid be used on cats?
Salicylic acid should not be used on cats without consulting a veterinarian first. Cats are more sensitive to certain medications and chemicals, and using salicylic acid without proper guidance can lead to potential toxicity and harm to the cat. It is best to always consult a veterinarian before using any new products on your cat.
What is the functional isomer of carboxylic acid?
The functional isomer of a carboxylic acid is an ester. Esters have a similar molecular formula to carboxylic acids, but the functional group is different - an ester has a carbonyl group bonded to an oxygen atom, rather than a hydroxyl group like in carboxylic acids.
What hydrogen ion is released by a carboxylic acid?
A carboxylic acid has the form:R-COOH or R-C(=O)OHWhere R is a hydrocarbon chain.A diagram from Wikipedia:The Hydrogen attached to the OH the one released by the acid.In reality, both bonds to the oxygen probably have some aspect of being 1 1/2 bonds rather than true double bonds (resonance), although, apparently in the acid form they are of different lengths. However, the bond lengths equalize when in the conjugate base form.
Why phenol do not give protonation reaction readly?
Phenol does not readily undergo protonation reactions because the lone pairs on the oxygen atom are delocalized within the aromatic ring, making it less available to accept a proton. The pi electrons in the aromatic ring stabilize the negative charge that would result from protonation, making the reaction less favorable compared to alcohols that lack an aromatic ring.
In real picric acid is not acid..then why it called acid?
Picric acid is acidic, as it has a fairly acidic phenolic proton. However, picric acid is not a carboxylic acid. Nevertheless, it is still called 'acid' because of its acidic proton, just as phenol was once called 'carbolic acid'.
What are the harmful effects of phenol present in dark chocolate?
•The substance can cause harmful effects on the central nervous system and heart resulting in coma. Phenol can also have its bad effects on liver and kidneys. Continuous use of phenol can corrode skin and tissue, can cause severe allergic reactions like difficulty breathing, tightness in chest, swelling of mouth, lips or tongue. It causes respiratory irritation, respiratory cancer, headaches, muscle pain. It can have bad impacts on immune system. •Rather than dark chocolate phenol also have other pathways in the environment to enter our body. This include consumer products like the throat lozenges, mouth washes, gargles, sausages, toilet cleaners and disinfectants, mountain cheese etc.
How are carboxylia acids produced?
Generally 3 types or reactions are used to produce carboxylic acids:(1) Hydrolysis (i.e. reacting with water) of carboxylic acid derivatives such as esters, amides, anhydrides, acid halides, or nitriles.(2) Oxidation of primary alcohols & aldehydes(3) Grignard reactionThese are found in any organic chemistry book. The explanations are rather lengthy to include here plus I'm not sure of your general knowledge of organic chemistry so you can understand it. But hopefully that helps. Post another question if you want more specific information.
Does soap contain a acid?
Some soaps may contain acids, such as citric acid or salicylic acid, for their beneficial properties. However, traditional soap is typically made by reacting fats or oils with a strong base, such as sodium hydroxide, rather than an acid.
Which element in the molecules of urea shows that it is formed from amino acids and not from glucose?
The presence of an amide group in the urea molecule indicates it is derived from amino acids rather than glucose. This amide group is formed from the reaction between ammonia and the carbonyl group of a carboxylic acid group, which is characteristic of amino acid synthesis.
