Homework Answers
Gas chromatography is based on an adsorption phenomenon. The stationary phase is a liquid or solid polymer coated on a capillary tube from inside. And the mobile phase is an inert gas like Helium of nitrogen. After injecting the sample, the substance is vaporized without decomposition and carried with the mobile phase such as helium gas. Compounds from the injected mixture interact with the stationary phase with different rates and hence they have different elution time or it is also called as the retention time. For every individual compound has different retention time so that this becomes the factor which distinguishes the compounds present in the mixture. As the different compounds elute at a different time at the end of colomn they are identified with different detectors such as are the flame ionization detector (FID) and the thermal conductivity detector (TCD).
The retention time is dependant on many factors and to name a few, the carrier gas flow rate (mobile phase), column length and the temperature.
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Organic Chemistry What is the parameter tbat you will compare between youe chromatogram and the one of the standard mix...
9 VII. Gas Chromatography 1. The organic mixture to be separated on the GC is injected...
9 VII. Gas Chromatography 1. The organic mixture to be separated on the GC is injected into the GC as a (gas, liquid, or solid). 2. The typical volume of mixture injected into a GC is 1-10 (microliters, milliliters, or deciliters). 3. Immediately upon entering the injection port the mixture is_ _(solidified, condensed, or vaporized). (heated, cooled, maintained at room 4. The event described in #3 occurs because the injection port is temperature). 5. An inert gas, referred to as...
Not sure where I'm going wrong :/ Help! Question 9 of 22 Organic Chemistry Mapes Three...
Not sure where I'm going wrong :/ Help!
Question 9 of 22 Organic Chemistry Mapes Three bottles A, B, and C have been found, each of which contains a liquid and is labeled "amine CotN. As an expert in amine chemistry, you have been hired as a consultant and asked to identify each compound. Compounds A and B give off a gas when they react with NaN02 and HCl at 0 ℃:C does not. However, when the aqueous reaction mixture...
The following questions are from an experiment titled Friedel-Crafts Alkylation for Organic Chemistry II Lab. There...
The following questions are from an experiment titled
Friedel-Crafts Alkylation for Organic Chemistry II Lab. There are
pictures attached of the lab manual.
2) Is this method a good route for the preparation of
p-sec-butyltoulene? Give reasons for your answer.
3) Why do you use a large excess of toulene. What are its
functions?
4) What is the purpose for adding the hydrochloric acid to the
water in the separatory funnel in step 5? Hint: If no acid is
added,...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
Organic chemistry post-lab question: "Why is important to add the alkyl halide dropwise in your reaction?...
Organic chemistry post-lab question: "Why is important
to add the alkyl halide dropwise in your reaction? (Hint: your
reaction is not heated, but you still need a water-cooled
condenser!)" Please answer in detail!
Here is a copy of the experiment, thank you!
The Grignard reaction is an important synthetic process by which a carbon-carbon bond is formed. Magnesium metal is first reacted with an organic halide. The resultant organo-magnesium halide (Grignard reagent) is then combined with a carbonyl compound, ultimately...
CH 111 - Introduction to Inorganic and Organic Chemistry Lab 10 - Exp. 341 Synthesis of...
CH 111 - Introduction to Inorganic and Organic Chemistry Lab 10 - Exp. 341 Synthesis of Strontium lodate In this lab, we will perform a synthesis reaction to generate a desired product. Synthesis reactions are performed in many different industries including fertilizers, plastics, pharmaceuticals and many others. The goal in a synthesis reaction is to generate and obtain as much of the desired product as possible. In this synthesis, the reaction between KIO, (potassium iodate) and Sr(NO3)2 (strontium nitrate) produces...
1. what is the purpose of the following in this experiment: a. concentrated (and not dilute)...
1. what is the purpose of the following in this
experiment:
a. concentrated (and not dilute) hydrochloric acid
b. collecting the distillate in ice
c. sodium bicarbonate extraction
d. water extraction
e. anhydrous sodium or magnesium sulfate
chapter Alkyl Halides and Nucleophilic Aliphatic Substitution 13.1 SYNTHESIS OF BUTYL CHLORIDE Alkyl halides can be prepared by reacting an alcohol with concentrated hydrogen halides: R-OH + H-X- R-OH, R-X. HO where X-CI, Br, I. The reaction of hydrochloric acid with 2 and...
Organic chemistry d 1.43 grams of caffeine from 10 tea bags. If each tea bag weighs...
Organic chemistry
d 1.43 grams of caffeine from 10 tea bags. If each tea bag weighs 3.3 grams, what is the percent yield caffeine in the tea. 7. If the density of a certain liquid material is 1.27 gyml, caleulate the volume of the material that would be equivalent to 10 grams of the materials. The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with a 10...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography?...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
Product was formed successfully based on the exp. below (about 85% yield), please interpret/discuss HNMR/IR in...
Product was formed successfully based on the exp. below (about
85% yield), please interpret/discuss HNMR/IR in as much detail as
possible and assign peaks on HNMR (which peak represents which
protons of which group, etc). Note: I already know how you
determine the formation of the product so you can skip that part of
part b).
Based on this exp:
Discuss the IR spectrum and what is the peak in IR that you can see for a specific functional group...
9 VII. Gas Chromatography 1. The organic mixture to be separated on the GC is injected into the GC as a (gas, liquid, or solid). 2. The typical volume of mixture injected into a GC is 1-10 (microliters, milliliters, or deciliters). 3. Immediately upon entering the injection port the mixture is_ _(solidified, condensed, or vaporized). (heated, cooled, maintained at room 4. The event described in #3 occurs because the injection port is temperature). 5. An inert gas, referred to as...
Not sure where I'm going wrong :/ Help!
Question 9 of 22 Organic Chemistry Mapes Three bottles A, B, and C have been found, each of which contains a liquid and is labeled "amine CotN. As an expert in amine chemistry, you have been hired as a consultant and asked to identify each compound. Compounds A and B give off a gas when they react with NaN02 and HCl at 0 ℃:C does not. However, when the aqueous reaction mixture...
The following questions are from an experiment titled
Friedel-Crafts Alkylation for Organic Chemistry II Lab. There are
pictures attached of the lab manual.
2) Is this method a good route for the preparation of
p-sec-butyltoulene? Give reasons for your answer.
3) Why do you use a large excess of toulene. What are its
functions?
4) What is the purpose for adding the hydrochloric acid to the
water in the separatory funnel in step 5? Hint: If no acid is
added,...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
Organic chemistry post-lab question: "Why is important
to add the alkyl halide dropwise in your reaction? (Hint: your
reaction is not heated, but you still need a water-cooled
condenser!)" Please answer in detail!
Here is a copy of the experiment, thank you!
The Grignard reaction is an important synthetic process by which a carbon-carbon bond is formed. Magnesium metal is first reacted with an organic halide. The resultant organo-magnesium halide (Grignard reagent) is then combined with a carbonyl compound, ultimately...
CH 111 - Introduction to Inorganic and Organic Chemistry Lab 10 - Exp. 341 Synthesis of Strontium lodate In this lab, we will perform a synthesis reaction to generate a desired product. Synthesis reactions are performed in many different industries including fertilizers, plastics, pharmaceuticals and many others. The goal in a synthesis reaction is to generate and obtain as much of the desired product as possible. In this synthesis, the reaction between KIO, (potassium iodate) and Sr(NO3)2 (strontium nitrate) produces...
1. what is the purpose of the following in this
experiment:
a. concentrated (and not dilute) hydrochloric acid
b. collecting the distillate in ice
c. sodium bicarbonate extraction
d. water extraction
e. anhydrous sodium or magnesium sulfate
chapter Alkyl Halides and Nucleophilic Aliphatic Substitution 13.1 SYNTHESIS OF BUTYL CHLORIDE Alkyl halides can be prepared by reacting an alcohol with concentrated hydrogen halides: R-OH + H-X- R-OH, R-X. HO where X-CI, Br, I. The reaction of hydrochloric acid with 2 and...
Organic chemistry
d 1.43 grams of caffeine from 10 tea bags. If each tea bag weighs 3.3 grams, what is the percent yield caffeine in the tea. 7. If the density of a certain liquid material is 1.27 gyml, caleulate the volume of the material that would be equivalent to 10 grams of the materials. The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with a 10...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
Product was formed successfully based on the exp. below (about
85% yield), please interpret/discuss HNMR/IR in as much detail as
possible and assign peaks on HNMR (which peak represents which
protons of which group, etc). Note: I already know how you
determine the formation of the product so you can skip that part of
part b).
Based on this exp:
Discuss the IR spectrum and what is the peak in IR that you can see for a specific functional group...
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