HomeworkLib
Question

ene equal parts of ben 6. Why do you need to use a calibrated or a good thermometer for m.p.and b.p determinations? 7. How is the m.p. of a compound affected by the presence of an 8. Why fractional distillation could be better than simple distillation? What is the difference between them? When do you need to apply one method instead another? 9. How to measure a boiling point ofa liquid?
science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

6.

Before doing any experiment related to BP and mp measure one should caliberate the thermometer to get better accuracy in measurement which may be disturbed by atomosphre or any impurities.

7.

Substances having soluble impurity has lower melting point than the pure substance but melting point is not affected by insoluble impurity

8.

Simple distillation works when the difference in boiling point is higher between two compound. But fractional distillation can be used for less difference in boiling point. So later one is better option for separation

9.

There are various method to calculate the bp of liquid like simple distillation and reflux method

0 0
Add a comment
Know the answer?
Add Answer to:
ene equal parts of ben 6. Why do you need to use a calibrated or a...
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

  • A simple distillation was performed to separate a mixture containing both hexane and heptane. Explain why...

    A simple distillation was performed to separate a mixture containing both hexane and heptane. Explain why the observed starting vapor temperature in the simple distillation should be above the boiling point of hexane. Then, explain why if a fractional distillation was performed instead you would have a better separation (be sure to include how the fractionating column works in your explanation).

  • #9. if you were trying to separate two compounds with very close boiling points how could...

    #9. if you were trying to separate two compounds with very close boiling points how could you increase the efficiency of a fractional distillation in order to separate those compounds? thank you!! b. Which component should still off ist? How does the boiling point of that liquid compare to comperare mesurements at the beginning of both simple and fractional distillation? d What does this comparison tell you about the composition of the station from both simple and tractional distillation? e....

  • Need help please. Experiment Five: Simple and Fractional Distillation 1. Calculate the area of the following...

    Need help please. Experiment Five: Simple and Fractional Distillation 1. Calculate the area of the following peak coming off of a GC. 12 2. If you have a binary mixture of carbon tetrachloride and tert-butyl alcohol, which compound should distill over first and why? Be sure to draw out both structures and look up each of their boiling points. 3. For the binary mixture of carbon tetrachloide and tert-butyl alcohol from above, what distillation technique would be most suitable and...

  • You are given the follow information: You need to apply k-means clustering,Your dataset has 1,000 observations,...

    You are given the follow information: You need to apply k-means clustering,Your dataset has 1,000 observations, Your dataset has 57 features, K=2 Answer the following questions How are the initial centroids selected? How many clusters will be produced? What measure is used to evaluate the quality of the clusters? For the evaluation measure, do higher or lower values indicate better clusters? Why?

  • Remember in experiment 2 you used boiling chips; can the boiling sticks be replaced by boiling...

    Remember in experiment 2 you used boiling chips; can the boiling sticks be replaced by boiling chips in this experiment? Explain your answer. Experiment2: Determination of Alcohol content of Wine by Fractional Distillation Introduction If a mixture of ethanol and water are warmed you might expect the more volatile (lower boiling) ethanol to boil first and then the water. This is not exactly true. As the mixture is warmed all the molecules within the flask will gain energy. In fact...

  • QUESTIONS Why do the crucible and lid need to be cooled before weighing? Be specific. 1....

    QUESTIONS Why do the crucible and lid need to be cooled before weighing? Be specific. 1. Assume that you failed to clean some grease off of your crucible before doing the percent water determination. If that grease then burned off during the determi- nation, explain how the percent water you calculated would be affected (i.e., to0 low, too high, no effect). Be specific. 2. Explain how each of the following would affect the percent sulfate you calculated, i.e, too low,...

  • 7) Name four reagents you can use to dry solvent. Why do we use magnesium sulfate...

    7) Name four reagents you can use to dry solvent. Why do we use magnesium sulfate in this lab instead of them? Introduction Alkyl halides can be prepared from alcohols by reactions with hydrogen halides (HCI, HBr, or HI) via nucleophilic substitution. In this type of reaction, the nucleophile displaces a leaving group from a carbon atom of an organic substrate (here the alcohol once protonated). Both electrons of the new bond to the carbon are provided by the nucleophile...

  • (If you need any more information just let me know) Determine the limiting reagent for the...

    (If you need any more information just let me know) Determine the limiting reagent for the preparation of 2-bromo-2-methylbutane and calculate the theoretical yield of product. 1 CHEM-2223 Organic Chemistry Laboratory I Exp. 7: Synthesis of 2-chloro-2-methylbutane In this reaction a tertiary alcohol, 2-methyl-2-butanol, is converted to a tertiary halide, 2-chloro- 2-methylbutane through a SN1 reaction. 1) Chemicals  2-Methyl-2-butanol  Hydrochloric acid, HCl (12 M)  Saturated sodium bicarbonate  Saturated sodium chloride (380 g/L)  Anhydrous sodium sulfate...

  • 9 Pre-Lab Questions 1. Why can you use a calorimeter to study the exchange of heat? EXPERIMENT A ...

    9 Pre-Lab Questions 1. Why can you use a calorimeter to study the exchange of heat? EXPERIMENT A calorimeier is a device u s eol to measure hot of roactisn th lainer wn th vr meni o insulated wall's to prevent hret exchange he enviran 2. Why is specific heat an intensive property? energy at o particular temperature 'is the some Its 9uanhhy towhich no physical alimen sian is agsian eof Nomaler heuw mach alaminunh, Is abiliy to aborb heat...

  • Need help with questions 4, 5,6. Can you explain how to and why we do certain...

    Need help with questions 4, 5,6. Can you explain how to and why we do certain steps to solve. e posnts . A.3e g sampie or a nyarocaroon compouno containing onay C ana nyarogen pr of CO2. A 9.29 ml sample weighing 21.6 ㎎was colected over water at a pressure of 796 torr at 25°C nyarogen proaucea cu.s (The vapor pressure of water is 23.8 torr at 25'C) What is the molecular formula of the compound? (8 points) 5. The...

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