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How do you calculate the potency of standard on as is basis from anhydrous and solvent free basis?
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Why use anhydrous pyridine?
pyridine is a bipolar base, and a solvent. It is usually used to catalyze organic reactions By using pyridine in many organic chemistry reactions, it eliminates and neutralizes the formation of acids.
How you calculate the weight of 1 liter of acetic acid?
You can NOT calculate density because it is a property; besides that, it is depending on concentration, solvent, and temperature. (Actually it also depends on pressure but not very significantly)
You developed your chromatogram too long and you can't find the solvent front describe and explian the possible effect on your results of the error?
If this happened you would not be able to calculate the Rf value. If you can't find the Rf value you will not be able to tell if the solvent is unknown.
Where you could find the standard Rf values for fatty acids and poly unsaturated fatty acids?
Rf value of oleic acid with solvent system
How many mol CaCO3 can be dissolved in 0.0720 mol HCl?
The amount of substance that will dissolve depends on the temperature and the solvent used. Thus, there is no way to tell how much will dissolve unless such a test is actually carried out (since that concentration of acid is not a standard solvent used in such experiments).
What is difference between anhydrous and dried basis?
1. anhydrous means : Means remove the water content & solvent free value calculated in the assay. 2. On dry base : Means remove the loss on dry & solvent free value calculated in the assay
What happens to a colour of a solute molecules when the solvent evaporates or boils?
The color of an anhydrous compound is sometimes different from the hydrated compound.
What is solvent in plumbing?
A solvent is a cleaner used to ensure a join or joint will be of an acceptable standard
What purpose does a 1 cm layer of anhydrous sodium sulfate in the apex of the funnel serve while transferring the dichloromethane extract into the round bottom flask.?
Anhydrous sodium sulfate is used as a drying agent to remove microscopic amounts of dissolved water in a solvent. It works by chemically reacting with the water by forming its hydrate, which is insoluble preferably in the solvent in this case dichloromethane. This allows one to filter off the crystals containing the water that would otherwise have remained dissolved in the dcm.
What purpose does a 1 cm layer of anhydrous sodium sulfate in the apex of the funnel serve while transferring the dichloromethane extract into the round-bottom flask?
Anhydrous sodium sulfate is used as a drying agent to remove microscopic amounts of dissolved water in a solvent. It works by chemically reacting with the water by forming its hydrate, which is insoluble preferably in the solvent in this case dichloromethane. This allows one to filter off the crystals containing the water that would otherwise have remained dissolved in the dcm.
Why is anhydrous sodium sulfate used in organic chemistry labs?
Because of its affinity for water, anhydrous sodium sulfate is often used to dry hydrophobic solvents used in aqueous organic extractions. For example a water based sample is extracted for organic compounds using dichloromethane, or ethyl ether in a separatory funnel. The organic layer is passed through a buchner funnel holding anhydrous sodium sulfate, yielding dried solvent extract.
Why use anhydrous pyridine?
pyridine is a bipolar base, and a solvent. It is usually used to catalyze organic reactions By using pyridine in many organic chemistry reactions, it eliminates and neutralizes the formation of acids.
What are the advantages of benzophenone as a solvent compared to water?
Benzophenone dissolves non-polar molecules better than water. It is commonly used in preparing pure and anhydrous solvents because it removes moisture and oxygen unlike water.
What is difference between lab solvant and ethanol?
lab solvent (or just "solvent"), is a very vague term. anything that is acting as the solvent in a particular mixture could be this "lab solvent". ethanol on the other hand is a specific example of a compound that is liquid at standard temperature and pressure. because it is a liquid, it can be used as a solvent. again - it would depend on what other compounds are involved (solutes).
What two things do you need to know in order to calculate concentration?
A measure of the amount of solute in a given amount of solvent. Where the units of concentration are grams of solute per milliter of solvent. ™ ~Ashna
Is Orthochlorotoluene used as a solvent?
It could be: It is a liquid at standard temperature and pressure and should certainly dissolve something.
What does Rf stand for How can it be calculated?
retadartion factor calculate it by Rf= distence moved by chemical distence moved by solvent ; ;-)
