Why is it better to use a rotovap instead of a hot plate to evaporate ether?

Solutions

Expert Solution

Rotary evaporators are used to remove solvents from reaction mixtures.They allow performing task very quickly. A typical rotary evaporator has a water bath that can be heated in either a metal container or crystallization dish. This keeps the solvent from freezing during the evaporation process. The solvent is removed under vacuum, is trapped by a condenser and is collected for easy reuse or disposal.Since the flask is rotated during the evaporation process, the surface area is larger than normal which increases the evaporation rate significantly.In addition, this method also avoids overheating of the target compound i.e. oxidation because lower temperatures are used. The boiling point of ether is 34.6 ^oC and flash point of ether is -45^oC so we need to very careful during evaporation of ether. Because of above rotovap application we should do this job in rotovap.

If we evaporate ether using hot plate then there is chances of fire because of low flash point. In rotovap, solution containg flask is connected tightly so there is no chances to catch fire.

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

If a student accidentally ran their TLC plate with 30% hexane/ether (instead of the 30% ether/hexane...

If a student accidentally ran their TLC plate with 30% hexane/ether (instead of the 30% ether/hexane as directed), briefly explain who their TLC results would differ.

Why is it better to use git cp instead of plain-old regular cp to copy a...

Why is it better to use git cp instead of plain-old regular cp to copy a file within the repository? What benefits would a large team of developers get from version control? Identify at least two. What benefits would a single developer (working alone) get from version control? Identify at least two.

Justify why someone may be better off investing their money in an RESP instead of a...

Justify why someone may be better off investing their money in an RESP instead of a GIC or savings account.

1. Why is it better to own 2 or more stocks instead of just 1? 2....

1. Why is it better to own 2 or more stocks instead of just 1? 2. Does the total rate of return formula consider the time value of money (i.e. is it annualized like a growth rate)? 3. a. True/False: Investors prefer high coefficients of variation. b. True/False: Diversification can remove ALL risk. 4. CAPM and SML are modified versions of what model?

Why might a researcher decided to use a polyprotein instead of individual subunits?

1- Why would a large country be better off favoring import-substitution industries instead of export industries?...

1- Why would a large country be better off favoring import-substitution industries instead of export industries? A- Increased production in import-substitution industries takes factors of production away from export industries, which effectively allows only the strongest industries to survive. B- Increased production in import-substitution industries increases the country's exports, which allows an improvement in the country's terms of trade. C- Increased production in import-substitution industries results in an increase in supply of the imported product, which results in a higher...

why inoculating an EMB plate and an MSA plate potentially useful?

1) Why do we use H3PO4 instead of H2SO4 as a catalyst for the synthesis of...

1) Why do we use H3PO4 instead of H2SO4 as a catalyst for the synthesis of cyclohexene? 2) Why do we use H3PO4 instead of HCl as a catalyst for the synthesis of cyclohexene? 3) What alkene(s) would be produced on dehydration of each of the following alcohols? If more than one product is possible, use Zaitsev’s rule to predict which product would be formed in greater amounts. a) 2-methylcyclohexanol b) 2,2-dimethylcyclohexanol c) 1,2-cyclohexanediol

Why is it more advantageous to use Edman degradation instead of Sanger’s sequencing method?

Why is it acceptable to use a clean, wet volumetric flask, instead of a clean, dry...

Why is it acceptable to use a clean, wet volumetric flask, instead of a clean, dry volumetric flask, when you are preparing your standard solutions by dilution? Explain in detail.

Subjects