2,220 Answered Questions for the topic organic chemistry

02/01/18

chemical that would react with ribitol phosphate.
i am a microbiologist, and i have a question from chemistry. i would like to know what are the possible kind of chemicals that would react with ribitol phosphate and result in a colour change or... more
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Organic Chemistry

01/10/18

Does R S configuration determine the compound is dextrotatory(=R) and leavorotatory(=S)
Well i read in my book that rs configuration can tell us about the optical rotation of a compound (optically active)  but elsewhere it was written that it can't be predicted based upon rs... more
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Organic Chemistry Chemistry

12/13/17

Boiling glass
To boil glass, the lime and sand mixture of potash was heated and the off gas spent 125 milliliters of barley hydroxide solution( Density = 1.14 grams/millilitres). The mass of the sediment was... more
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Organic Chemistry

12/10/17

Do double bonds or triple bonds get higher priority when naming compounds?
For example, if I have a molecule with a triple and a double bond, which would have priority for a low number with IUPAC naming?
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12/03/17

I need to calculate the molar extinction coefficient for phycocyanin.
I have a calibration curve, with the equation of the line, and the concentrations of the plotted points, with absorbency plotted against concentration (mg/ml) How do I solve using the Beer Lambert... more
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Organic Chemistry Chemistry

11/22/17

If you react an ester with an organometalic would you just get a tertiary alcohol?
If you react an ester with an organometalic would you just get a tertiary alcohol?
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Organic Chemistry Chemistry Alkene Addition Reaction

11/09/17

Why is the addition of Br2 to an alkene not a nucleophilic addition reaction ?
My text book says that when a Br2 molecule approaches the C=C in an alkene, a δ+ charge is induced on a nearer Br atom. Then this atom attracts the electrons in the C=C bond and forms a covalent... more
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Organic Chemistry Multistep Equations

11/07/17

how to convert ethene + butene to make 3-hydroxypentanal
 Multistep synthesis question     
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Organic Chemistry

11/02/17

are the terpenes alpha-pinene and alpha-terpinene the same?
I am studying aromatherapy and have been looking at the chemistry of essential oils.  In particular I have come across alpha -pinene and alpha-terpinene.  Are these two compounds the same or... more
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Organic Chemistry Chemistry Lab Chemistry Lab

11/01/17

Refractive Index - ORGANIC CHEMISTRY LAB
A student attempts to separate a sample of cyclohexane and ethylbenzene by distillation. After the distillation the student obtains an n 20D of 1.4355 for what should be pure cyclohexane with a... more
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Organic Chemistry Chemistry Lab Chemistry Lab

10/31/17

Tea contains about 3% caffeine by mass. Assuming each tea bag contained 2.25 g of tea, did you recover the expected amount of caffeine from two tea bags?
So what is the expected amount of caffeine? Is it 0.0675g or is it 0.135g?  In lab, I recovered 0.018g of caffeine
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Organic Chemistry

10/25/17

What is the measured optical rotation of a (s) and (r) bromobutane mixture
If a solution of 10.0 g of (S)-2-bromobutane in 100 mL of hexane gives an observed rotation of +2.31, then what would be the measured optical rotation of a solution that contains 7.5 g of... more
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Organic Chemistry

10/24/17

Which one would elute first from the column chromatography that has a stationary phase and a weak polar solvent?Explain your answer.
Which one would elute first from the column chromatography that has a stationary phase and a weak polar solvent?Explain your answer.   A)Hexane B)Hexan-1-ol C)Hexene D)Hexan-1-one
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Organic Chemistry Chemistry Lab Lab Report

10/21/17

CALCULATING PARTITION COEFFICIENT - Organic Chemistry Lab
1. Calculate the partition coefficient of caffeine in water/methylene chloride from the following data: 10.3 g/100 mL for methylene chloride and 2.04 g/100 mL for water.   MY ANSWER:    K =... more
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Organic Chemistry

10/21/17

Questions about propyne reacting with H2O, H2SO4 and HgSO4?
I am enrolled in Organic Chemistry 1 at a junior college and I need some assistance in understanding this mechanism. I have previously taken chemistry in high school with no problems, this would be... more
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Organic Chemistry Acid Base Extractions

10/17/17

separation schemes flow chart
I'm trying to do a separation scheme that separates benzophenone, 3-methylaniline, and salicyclic acid but I have no clue what to use, please help
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Organic Chemistry Chemistry Lab

10/15/17

Provide the chemical reaction being demonstrated in the experiment. it should include the starting materials, reagents, and products.
Procedure:1) Accurately weigh approximately 0.40 g of Dimethyl maleate into a 50 mL round bottom flask that possesses a ground glass joint, and record the weight.2) Dissolve the Dimethyl maleate in... more
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Organic Chemistry Chemistry Lab Report

10/15/17

EXTRACTIONS: What if methylene chloride was used as the organic solvent instead of diethyl ether?
If methylene chloride (CH2Cl2) was used as the organic solvent instead of diethyl ether what would be different when performing the extractions?    I've already done the lab where we had to... more
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Organic Chemistry

10/14/17

What molecules will react with FeCl3
Multiple answer what molecules will react with FeCl3 A. Cyclohexene B. Chlorobenzene C. ChlorophenolD. Phenol
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Organic Chemistry Chemistry

10/07/17

Stacey adds so much MgSO4 to an ether solution of hexyl propanoate that no liquid can be seen anymore. How can she recover her product?
Stacey adds so much MgSO4 to an ether solution of hexyl propanoate that no liquid can be seen anymore. How can she recover her product?
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Organic Chemistry Chemistry

10/07/17

OCHEM question
The partition coefficient for compound A between hexanes and water is 12. Assume 10 grams of A is dissolved in 100mL of water . This aqueous solution is extracted with 100 mL of hexanes. How much A... more
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Organic Chemistry Chemistry Chemistry Lab

10/05/17

When compound A is partitioned between equal volumes of methylene chloride and water
When compound A is partitioned between equal volumes of methylene chloride and water one finds that the partition coefficient is equal to 1. This means that the compound happens to be equally... more
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Organic Chemistry Chemistry Lab

09/29/17

Rf values TLC - Organic Chemistry LAB
    For my developing solvent, I used 6:4 hexane:ethyl acetate. For my reference spot, I mixed some salicylic acid and ethyl acetate. And for my test spot, I used some impure aspirin and ethyl... more
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Organic Chemistry Chemistry

09/29/17

What is more polar? Aspirin or Salicylic acid?
What is more polar? Aspirin or Salicylic acid? Please explain, and thank you!
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Organic Chemistry Chemistry Polarity

09/28/17

Which molecule is more polar?
p-methoxystyrene or p-cresol (p-methylphenol)?   I think p-cresol (p-methylphenol) would be more polar because of the OH. Conformation would be greatly appreciated!
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