je 2.4-dinitrophenylhyd 5) You have been given an unknown that gives a positive 2,4-dinitrophen a) What...
5) You have been given an unknown that gives a positive 2,4-dinitrophenylhydrazine test. a) What does this positive 2,4 DNP test indicate? b) What subsequent tests could you run to be more specific about the unknown's identity? c) What would you see in the subsequent tests, and what would your observations tell you about the identity of the unknown?
1. (6 pts) These are some of the preliminary tests that you will be doing on days 1-2. For each test, write down what type of molecule would give a positive test and what a positive result would look like. DNP: Solubility Beilstein: Ignition: 2. (2 pts) For the 2,4-dinitrophenylhydrazine test, write a chemical reaction between that reagent and one of the "known" compounds that would give a positive result. 17 1. (6 pts) These are some of the preliminary...
Pre-lab: If your unknown was 2-bromooctanoic acid, what would you expect the results of the following tests to be? Solubility in: H2O NaOH NaHCO3 HCl H2SO4 Jones Oxidation Test: 2,4-DNP Test: Flame Test: Beilstein Test:
2) You just been given an unknown organic liquid and told that it is either propanal, cyclohexanone, or butylamine. Name ONE chemical test("odor" is NOT a chemical test because it is much too subjective) you could perform on the unknown to prove it was propanal, AND state what would you observe in that test to support your answer. BE SPECIFIC ABOUT YOUR OBSERVATIONS. Name ONE chemical test (A DIFFERENT TEST FROM THE ONE YOU JUST NAMED ABOVE) you could perform...
2) You just been given an unknown organic liquid and told that it is either propanal, cyclohexe or butylamine. Name ONE chemical test (odor" is NOT a chemical test because it is much too subjective) could perform on the unknown to prove it was propanal, AND state what would you observe in the test to support your answer. BE SPECIFIC ABOUT YOUR OBSERVATIONS Name ONE chemical test (A DIFFERENT TEST FROM THE ONE YOU JUST NAMED ABOVE) you could perform...
Experiment 9: The Preparation of Unknown Derivatives0k Homework Due in a day Pre-Lab Questions Question1 Homework Unanswered If your unknown compound is an alcohol and not a phenol, what derivatives can you make to verify the identity of the unknown assuming there is melting point data for the derivative in the Blue book? Choose all that apply. Multiple answers: You can select more than one option O A phenylurethane derivative O B benzamide derivative O C2,4-dinitrophenylhydrazone (2,4-DNP) derivative o D...
can you please answer all the questions You have been given another unknown and the Gram stain results revealed Gram positive rods. Your TA now tells you that you should inoculate your unknown into a TSB broth to be incubated at 65 degrees C for 24 hr. and to streak it onto a TSA plate for isolation. The TSA plate is incubated at 35-37 degrees C for 24 hr. It will then be used to do further inoculations of your...
DEL PLT 7) You have just been handed a sample of an unknown liquid. You are told that the sample is either water or a hydrocarbon, but you do not know which. The sample is clear, colorless, and has no odor. What tests would you conduct to determine whether the unknown sample was a hydrocarbon or water? What would you see in those tests to support your answer?
12) What test lets you tell between an aldehyde and a ketone? 2pts 13) An unknown yields a positive Jones test. Which of these could be the unknown? (Multiple answers possible) 2pts o 엉 ㅇ A B C D 14) An unknown yields a positive DNPH test and a negative Tollens test. Which of these is the unknown? 2pts H . مرز A D С B 15) What tests would be positive for the following molecule? 2pts i. H
POST-LAB QUESTIONS 1. A compound of molecular formula CH..0 forms a yellow precipitate with 2,4-dinitrophenylhydrazine reagent and a yellow precipitate with reagents for the iodoform test, draw the structural formula for this compound. 2. What kind of results do you see when the following compounds are mixed together with the given test solution? a) with 2,4-dinitrophenylhydrazine with chromic with chromic acid with 12-KI reagent CH3CH2CH with Tollens' reagent 3. Write the structure of the compound that gives a silver mirror...