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Why water is not used in normal phase hplc analysis?
In normal-phase chromatography, the stationary phase is polar and the mobile phase is a mixture of non-polar solvents such as hexane and slightly more polar solvents such as isopropanol. water is the most polar solvent of all solvents. If you use water as a mobile phase, the polar analytes will remain dissolved in water and there will be no retention of analytes on the stationary phase. If there is no retention on stationary phase, there is no separation
What kinds of solutes expect to dissolve in nonpolar solvents?
Nonpolar solvents are typically unable to dissolve polar or ionic solutes, as their molecular structure lacks the necessary polarity or charge to interact with these solutes. However, nonpolar solvents can dissolve nonpolar solutes, such as hydrocarbons or organic compounds with long chains of carbon and hydrogen atoms.
What solvents must be used if the substance won't dissolve?
This question is a bit vague, but I will do my best to help clarify. In describing solubility of certain solutes, it is important to remember that "like dissolves like". This means that polar solvents will dissolves polar solutes. A polar substance is one who has a partial charge in one direction of the molecule. So a polar solute, like ammonia (NH3) will dissolve readily is a polar solvent, like water (H2O). Likewise, non-polar solutes will dissolve in non-polar solvents.So if the substance won't dissolve in what you are trying to dissolve it in, use a solvent with the opposite polarity.
Use the electronegativity chart to determine the type of bond that will form between As and Al?
polar
Can you use an iron on transfer with a foam sheet?
i think it would melt the foam
Why water is not used in normal phase hplc analysis?
In normal-phase chromatography, the stationary phase is polar and the mobile phase is a mixture of non-polar solvents such as hexane and slightly more polar solvents such as isopropanol. water is the most polar solvent of all solvents. If you use water as a mobile phase, the polar analytes will remain dissolved in water and there will be no retention of analytes on the stationary phase. If there is no retention on stationary phase, there is no separation
Why water is not used in normal phase analysis?
In normal-phase chromatography, the stationary phase is polar and the mobile phase is a mixture of non-polar solvents such as hexane and slightly more polar solvents such as isopropanol. water is the most polar solvent of all solvents. If you use water as a mobile phase, the polar analytes will remain dissolved in water and there will be no retention of analytes on the stationary phase. If there is no retention on stationary phase, there is no separation
What kind of solutes are soluble in non-polar solvents?
pentane, hexane, benzene, kerosene, gasoline, some in acetone, methyl ethyl ketone, generally anything non polar with a low molecular weight
What are types of solvents for plant extraction?
Plants material contains Organic compounds along with salts and water, some organic compounds are polar and soluble in ethyl alcohol or ethyl acetate but some are non polar and soluble in ether or hexane, so two types of solvents may be used for plants extraction, the best way is to use non polar solvent first and extract the non polar compounds then use the polar solvent and extract the polar compounds.
What kinds of solutes expect to dissolve in nonpolar solvents?
Nonpolar solvents are typically unable to dissolve polar or ionic solutes, as their molecular structure lacks the necessary polarity or charge to interact with these solutes. However, nonpolar solvents can dissolve nonpolar solutes, such as hydrocarbons or organic compounds with long chains of carbon and hydrogen atoms.
What solvents must be used if the substance won't dissolve?
This question is a bit vague, but I will do my best to help clarify. In describing solubility of certain solutes, it is important to remember that "like dissolves like". This means that polar solvents will dissolves polar solutes. A polar substance is one who has a partial charge in one direction of the molecule. So a polar solute, like ammonia (NH3) will dissolve readily is a polar solvent, like water (H2O). Likewise, non-polar solutes will dissolve in non-polar solvents.So if the substance won't dissolve in what you are trying to dissolve it in, use a solvent with the opposite polarity.
Why methyl is poor extraction solvents?
Both are miscible (fully soluble) with water, so you would not be able to form two layers. For extractions and washes, you must use a solvent that is insoluble with water, such as ethyl acetate, dichloromethane, ether, etc.
What is the organic solvent can use to dissolve urea please urgent?
Urea is a polar molecule that readily / easily dissolves in the polar solvent - water. The term 'organic solvent' is used to describe the more powerful non-polar solvents, such as benzene, or carbon tetrachloride (dry cleaning fluid), that are used to dissolve non-polar compounds.
What is best way to remove silicone spray?
typically you want to use a solvent that can dissolve silicone. Heptane and hexane are two of the primary choices for such a task.Non polar solvents are best. T
What kind of foam insulation would be best for an older home?
Our home is extremely cold in the winter. What type of foam insulation would be best to use in the attic?
Is a fire extinguisher the smae foam firefighters use?
No. Fire extinguishers use a dry powder to smother the fire. Firefighters use two types of foam that can be broken down into more categories. A class "A" foam is actually a type of soap. It is used to break up water tension so that water can seep into the ground and/or fuel better. A class "B" foam is used to make a blanket that smothers gasoline or diesel type fires.
Use the electronegativity chart to determine the type of bond that will form between this pair of elements.?
its polar found by smiley
