ZuoTi.Pro
Question


Question 1 (1 point) Saved Chromatography is a technique that separates substances in a mixture based on the interactions of

Question 2 (1 point) Saved The mobile phase carries substances along at a rate that is dependent on the attraction of the sub
Question 3 (1 point) Use 10 mL of 10% isopropanol followed by 10 mL of distilled water to wash the column until the entire Ko
Question 4 (1 point) In a chromatographic experiment with a polar stationary phase, polar compounds will elute first. True Fa
science   chemistry   
0 1
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Ans:

Question 1. True. In chromatography techniques polar compound bind more tightly to silica and nonpolar will bind loosely and compounds will get separated from mixture.

Question 2. True. Substance will carry along with mobile phase depending on how much tightly and loosely binds to silica, depending apoun polarity of compounds.

Question 3. True. All polar and nonpolar impurities will come out with 10% isopropanol and distilled water, so everything will elute in this solvent system.

Question 4. False. Polar compounds will binds more tightly to polar stationary phase so nonpolar compound will come first and polar compound will come later.

1 0
Add a comment
Know the answer?
Add Answer to:
Question 1 (1 point) Saved Chromatography is a technique that separates substances in a mixture based...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Chromatography Basics Multiple Choice: Answer the following multiple choice questions about Chromatography Basics  (SHOW WORKING): 1) In...

    Chromatography Basics Multiple Choice: Answer the following multiple choice questions about Chromatography Basics  (SHOW WORKING): 1) In a given chromatographic column, A) different solutes behave as if there are a different number of theoretical plates for each. B) the number of theoretical plates is the same for all solutes. C) efficiency is improved by increasing plate height. 2) What useful information can be found from a Van Deemter plot? A) The selectivity factor B) Optimum mobile phase flow rate C) Optimum...

  • Which of the following statements regarding thin layer chromatography are TRUE? Partition chromatography separates compounds based...

    Which of the following statements regarding thin layer chromatography are TRUE? Partition chromatography separates compounds based on how they distribute themselves between the stationary and mobile phases. In thin layer chromatography, a polar organic compound will be attracted to the adsorbent and therefore travel further up the plate than a non-polar compound The Rf value is independent of the adsorbent material used. In thin layer chromatography, a polar organic compound will be repelled by the adsorbent and therefore travel not...

  • Background In this lab, we are going to learn how to use a powerful separation technique...

    Background In this lab, we are going to learn how to use a powerful separation technique called chromatography which can separate compounds that are quite similar to one another. Chromatography is a general type of separation in which a mixture of compounds passes through a stationary phase. Different compounds have different relative affinities for the mixture traveling along the stationary phase, or the mobile phase, and the stationary phase, causing these compounds to separate from one another. More specifically, we’re...

  • 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...

  • 1mixture of luorene 1. Chromatography Concept. Draw and name the structures of the two substances in...

    1mixture of luorene 1. Chromatography Concept. Draw and name the structures of the two substances in today's Cuoreron sample. Remembering that hexane will be the first eluent, and the stationary phase is alumina, which of these two substances should we expect to come out of the column first? Defend Si02 your answer [30pts] Al2O3 2. Equipment Practicals. In preparing the chromatography column, you were strongly advised prevent the stationary phase from drying. Suggest why you don't want the column to...

  • Question 2 (1 point) In liquid chromatography the stationary phase carry each substance along the column....

    Question 2 (1 point) In liquid chromatography the stationary phase carry each substance along the column. True False

  • Ethylene glycol boiling point-197.30C 1-butanol-117.6C 2-butanol-99.5 C Butanone-79.4 C How would a gradient elution(60...

    Ethylene glycol boiling point-197.30C 1-butanol-117.6C 2-butanol-99.5 C Butanone-79.4 C How would a gradient elution(60 C-140 C) impact the chromatogram? Mobile Phase - Air (Flow Rate = 20 mL/min), Stationary Phase - poly(dimethylsiloxane), Oven Temperature - 75 °C. Ethane-1,2 diol (ethylene glycol), butanone, 1-butanol, 2-butanol In gas chromatography (GC) which component elute first depends on the boiling point. In GC the mixture is first converted to its gaseous states and then passes through the column. The component which has lowest boiling...

  • Question 1 Which of the following is the advantage of straight packed column? Selected Answer: It...

    Question 1 Which of the following is the advantage of straight packed column? Selected Answer: It can be repacked easily Answers It can be packed uniformly It can be repacked easily It is compact It is easier to heat it evenly Question 2 Which of the following statements most accurately describes thin-layer chromatography? Selected Answer: technique used to separate non-volatile mixtures, the mobile phase has different properties from the stationary phase. Answers The mobile phase is the solvent also called...

  • Acetylation of ferrocene and column chromatography Lab 4: Question 3 Homework • Unanswered Important ... The...

    Acetylation of ferrocene and column chromatography Lab 4: Question 3 Homework • Unanswered Important ... The solvent is changed from petroleum ether to diethyl ether after the ferrocene is collected from the column. Why not use diethyl ether the entire time? Because diethyl ether is more polar than petroleum ether Because petroleum ether selectively elutes ferrocene since it contains more ether oxygens than diethyl ether Because diethyl ether would lead to a poorer separation of ferrocene and acetylferrocene Both a...

  • Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. 1. What is the purpose of the mobile...

    Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. 1. What is the purpose of the mobile phase in chromatography? 2. What is the Ry value for a component in a sample? Lab 3: Chromatography 3. A student developed chromatograms for pure substances A, B, and C, and an containing some of the substances A, B and C. Calculate the values of A, , component of the unknown mixture. Identify the substances present in the unknown pure substances A, B, and...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT