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Because you are providing a greater surface area of contact between the aqueous layer and organic layer
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoIn single step extraction more amount of solvent is left in the process, contradictory to what is said that minimum amount of solvent should be left.
Wiki User
∙ 11y agorepeated extraction in wich solvent is used in small portion are more effective than using a single large volume of solvent
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Why is ethanol a better solvent than water for recrystalization?
the answer is yes.
What is a necessary condition for extraction of a substance from an aqueous solution?
There must exist a solvent for the substance to be extracted in which this substance's solubility is greater than the substance's solubility in water, and the solvent also must not be miscible in water, so that an interface between the solvent and water will be formed in a mixture of the two.
Why would a solvent like turpentine be better for removing grease and grime than water?
Turpentine and greases are both nonpolar compounds.
Explain why a solution has a lower boiling point than the pure solvent?
Most solutions have a HIGHER boiling point than the pure solvent. A solution with a lower boiling point than the solvent has formed an azeotrope.
What is the principle of solvent extraction?
Leaching is one of many solid-fluid separation processes that are carried out in the chemical, mineral and related industries. In fact, it is one of the oldest unit operations in the chemical industries. The fundamental principle behind leaching is the removal of a soluble material from an insoluble, permeable solid phase. The soluble fraction, solid or liquid, may exist mechanically in the pore structure of the insoluble material or chemically combined with that material. This soluble material is removed through dissolution in a dissolving solvent. The most familiar example of leaching is the extraction of tea and coffee, and most importantly mineral recovery. The rate of leaching (extraction) is affected by many physical and chemical phenomena. Mass transfer and equilibriumphenomena obviously playmajor roles. The process of leaching consists of the following steps: (i) The solvent diffuses into the solid phase; (ii) The diffused solvent dissolves the solutes (i.e. transfer the solute to the liquid phase). Leaching is always followed by solvent recovery, which involves another mass transfer operation; such as filtration.
Would methanol be a better or poorer solvent for extraction of cholesterol from egg yolk compared to 2-propanol?
The solubility of cholesterol in methanol is 0.014. 2-propanol would be a better solvent than methanol for the extraction of cholesterol from egg yolk.
Why is ethanol a better solvent than water for recrystalization?
the answer is yes.
What is a necessary condition for extraction of a substance from an aqueous solution?
There must exist a solvent for the substance to be extracted in which this substance's solubility is greater than the substance's solubility in water, and the solvent also must not be miscible in water, so that an interface between the solvent and water will be formed in a mixture of the two.
What is different about a solvent printer?
A solvent printer has several distinct qualities that differentiate it from regular printers. A solvent printer is less expensive than a regular printer, and it also prints in better quality.
What are the advantages and disadvantages of solvent extraction?
The advantages are: - Goldfish requires less solvent than Soxhlet (solvent in Soxhlet has to reach the siphon level). - Goldfish is quicker because the sample is constantly in contact with the solvent. Source: CECCHI, Heloísa Máscia."Fundamentos Teóricos e Práticos em Análise de Alimentos". Editora Unicamp. 2a Edição. 207p. 2003.
Are natural gas ovens better for the environment?
Better than what? Costs of extraction make NatGas a poor environmental choice, if for no other reason than extraction leakage--about 3%. NatGas is mostly methane, some 25 times more potent a greenhouse gas than CO2. Reflector ovens are the only sustainable way to go.
What is preferred in DNA extraction ethanol or isopropanol and why?
Isopropanol is more preferred than ethanol in DNA extraction, as isopropanol facilitates precipitation more better, as it possess very less i.e., 0.6 to 0.7 volumes of alcohol.
Why would a solvent like turpentine be better for removing grease and grime than water?
Turpentine and greases are both nonpolar compounds.
Is solvent greater than or less than the volume of solute?
The solvent is the greater of the two dissolved quantities.
Explain why a solution has a lower boiling point than the pure solvent?
Most solutions have a HIGHER boiling point than the pure solvent. A solution with a lower boiling point than the solvent has formed an azeotrope.
What is the principle of solvent extraction?
Leaching is one of many solid-fluid separation processes that are carried out in the chemical, mineral and related industries. In fact, it is one of the oldest unit operations in the chemical industries. The fundamental principle behind leaching is the removal of a soluble material from an insoluble, permeable solid phase. The soluble fraction, solid or liquid, may exist mechanically in the pore structure of the insoluble material or chemically combined with that material. This soluble material is removed through dissolution in a dissolving solvent. The most familiar example of leaching is the extraction of tea and coffee, and most importantly mineral recovery. The rate of leaching (extraction) is affected by many physical and chemical phenomena. Mass transfer and equilibriumphenomena obviously playmajor roles. The process of leaching consists of the following steps: (i) The solvent diffuses into the solid phase; (ii) The diffused solvent dissolves the solutes (i.e. transfer the solute to the liquid phase). Leaching is always followed by solvent recovery, which involves another mass transfer operation; such as filtration.
What is better on mild steel spray painting or powder coating?
Powder coating tends to hold better because it does not require a solvent to keep it in a liquid suspension, meaning it is easier to use at room temperature and covers better than spray paint.
