you want to purify 10g of a compound A that has been contaminated with 0.20g of...

you want to purify 10g of a compound A that has been contaminated with 0.20g of compound B. solubilities in water of the two compounds are given.

compound A - solubility at 20°c= 0.029g/mol, solubility at 100°c= 0.680g/mol

compound B - solubility at 20°c = 0.22, solubility at 100°c = 6.67

a) what volume of boiling water is needed to dissolve 10g of compound A?

b) How much of compound A will remain after cooling to 20°c?

c) what is the maximum amount of compound A that can be recovered in the first crop of this recrystallization?

d) will any compound B crystals form ( will compound B be pure)? show work to explain answer.

Expert Solution

queen_honey_blossom answered 1 year ago

Describe how you can purify a sample of toluene suspected to be contaminated with benzene?

An aqueous solution containing 10g of an optically pure compound was diluted to 500 mL with...

An aqueous solution containing 10g of an optically pure compound was diluted to 500 mL with water and was found to have a specific rotation of -133 degrees. If this solution were mixed with 500mL of a solution containing 6g of a racemic mixture of the compound, what would the specific rotation of the resulting mixture of the compound? What would be its optical purity?

Describe how you could separate and purify compound A from a mixture of two neutral compounds...

Describe how you could separate and purify compound A from a mixture of two neutral compounds (A and B) when A comprises 95% of the total and B the other 5% of the total. Assume that A and B have similar polarities.

How can you distill and purify a compound at temperature below its normal boiling point?

You want to purify electron transfer proteins. Which specific organelle you would like to enrich for...

You want to purify electron transfer proteins. Which specific organelle you would like to enrich for this purification (2 points)? You get to choose the starting tissue, either from a cow heart or a cow liver. Which one you would like to choose (2 points)? Why does it make physiological sense (2 points)?

I want you to research how to purify a protein from cell culture. After purification of...

I want you to research how to purify a protein from cell culture. After purification of the protein, you would need to quantify the protein using Bradford Assay and run the protein on SDS-PAGE gel for Western blot analysis to determine the amount of specific in a sample. Write out a protocol for the isolation of protein from human cell culture- you can determine the type of cells you are purifying the protein from Write out a protocol for the...

A grounwate has been contaminated with carbon tetrachloride at a level of 250 ppm (by mass)....

A grounwate has been contaminated with carbon tetrachloride at a level of 250 ppm (by mass). Assuming equilibrium with the air in the soil right above the groundwater table, calculate the concentration of carbon tetrachloride in the air space. Give your answer in ppm (by volume). The Henry's Law constant for carbon tetrachloride is 3.0 kPa/ (gmol/m^3) and the total air pressure in the soild is 1,013 kPa.

You are attempting to purify a protein that has a pI of 9.0 from a mixture...

You are attempting to purify a protein that has a pI of 9.0 from a mixture of similarly sized proteins, and have access to different purification columns. For this protein, you would select as your first column for purification an: (a) Anion exchange (b) Cation exchange (c) Gel filtration (d) Heparin sulfate (e) Ammonium sulfate

Every time the compound is contaminated the melting range will go up. Group of answer choices...

Every time the compound is contaminated the melting range will go up. Group of answer choices True False

A community’s groundwater has been contaminated by perchloroethylene after years of operation of a dry-cleaning business....

A community’s groundwater has been contaminated by perchloroethylene after years of operation of a dry-cleaning business. Groundwater supplies a spring that feeds a pond and stream and is also the source for a well. A local family relies on the well for their drinking water and regularly eats fish caught in the stream and pond. The concentration of perchloroethylene in the groundwater is found to be 80 mg/L, and the chronic oral RfD is 0.006 mg/kg/day. a.) Assuming all exposure...

Question