organic chemistry lab modeling

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organic chemistry lab experiments (steam distillation) and build modeling and post pictures

organic chemistry lab experiments (steam distillation) and build modeling and post pictures

Organic Modeling Lab III Part III Build more complicated hydrocarbons Name: 1. Adamantane is an exquisitely symmetrical hydrocarbon that was originally isolated from petroleum in 1933 by the Czech researchers S. Landa and V. Machacek. Its synthesis was first reported by Vladimir Prelog in 1941. It’s the simplest diamondoid compound and is nice to look at, but it has few practical applications. Paste the picture here B: How many cyclohexane rings are there in the structure? Are they all chair conformations? Organic Modeling Lab III Diamantane is an organic compound that is a member of the diamondoids . These are a cage hydrocarbons with structures similar to a subunit of the diamond lattice. It is a colorless solid that has been a topic of research since its discovery in oil and separation from deep natural gas condensates. Diamondoids such as diamante exhibit unusual properties, including low surface energies, high densities, high hydrophobicities, and resistance to oxidation. Paste the picture here B: How many cyclohexane rings are in the structure? Are they all chair conformations?
Experiment 7: Liquid-Liquid Extraction Post-Laboratory Questions Name: 1. In an experiment you need to apply the liquid-liquid extraction to separate naphthalene, benzoic acid and 4-tertbutylphenol, which of the three compounds you separated in this experiment dissolved in aqueous NaHCO3? Which of the three compounds you separated in this experiment dissolved in aqueous NaOH? Which compound was left in the ether? 2. List all possible balanced chemical reactions in the extraction process in your experiment.
Experiment 7: Liquid-liquid Extraction Pre-Laboratory Questions Name: 1. Consider the following solvent pairs. If mixed together, which pairs would form two layers? If they form two layers, which solvent would be on top? a. hexanes and water b. water and methylene chloride c. hexanes and methylene chloride d. methanol and hexanes e. ethanol and water f. acetone and toluene 2. Five grams of Compound A is dissolved in 90 mL of water. The distribution coefficient for Compound A between hexanes and water is 5: KCompound A(hexanes/water) = 5 a. How much of Compound A will be in the hexanes if you extract it from the water one time with 90 mL of hexanes? b. How much of Compound A will be in the hexanes if you extract it from the water with three sequential extractions using 30 mL of hexanes each time, and then combine the hexanes extracts?
Experiment 6: Steam Distillation Post-Laboratory Questions Name: 1. A mixture of ethyl iodide C2H5I, bp 72.3 oC) and water boils at 63.7 oC. What weight of ethyl iodide would be carried over by 1 g of steam during steam distillation? 2. The condensate of a steam distillation contains 8 g of an unknown compound and 18 g of water. The mixture steam distilled at 98 oc. What is the molecular weight of the unknown? (Vapor pressure for water at 98 oc can be found in your textbook)
Experiment 6: Steam Distillation Pre-Laboratory Questions Name: 1. What criteria would you use to decide whether distillation is an appropriate technique for the purification of a reaction product? What type of distillation method – simple, fractional, vacuum, or steam – should be used?

Tutor Answer

Prof_karsis
School: Duke University

Attached.

Experiment 6: Steam Distillation
Pre-Laboratory Questions

Name:

1. What criteria would you use to decide whether distillation is an appropriate
technique for the purification of a reaction product? What type of distillation
method – simple, fractional, vacuum, or steam – should be used?
The general critera to choose distillation method would be if the indivisual
cmponents of mixtures are having a large difference in their boiling point.
Distillation is the most useful method for purification of liquids and it is used
routinely for purifying solvents and rgents. Through appropriate aparatus, it is
possible to seperate liqids whocs boiling points differ by less than 5oC .

Simple distillation: This is useful only for distilling compounds from nonvolatile
residues or for separating liquids whose boiling points differ by at least 50oC.

Fractional distillation: It is the separation of a mixture into its component parts, or
fractions, separating chemical compounds by their boiling point by heating them
to a temperature at which one or more fractions of the compound will vaporize. It
uses distillation to fractionate. Generally the component parts boil at less than
25 °C from each other under a pressure of one atm. pressure.

Vacuum distillation: Many compounds decomposes when heated to their boiling
points, so they cannot be distilled at atmospheric pressure. In this case, it may be
possible to avoid thermal decmposition by carrying out the distillation at a
reduced pressure. the reduction...

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Anonymous
Wow this is really good.... didn't expect it. Sweet!!!!

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