What is the purpose of adding water after cooling the reaction mixture in this experiment? I...
What is the purpose of adding water after cooling the reaction mixture in this experiment?
I understand it is to precipitate the product, but what exactly does water do in this, what impurity does it get rid of and how?
Mesostillbenedibromide crude with KOH and triethyl glycol in a double elimination to produce Diphenylacetylene. Water is added after the reaction mixture is cooled. Then it is put through vacuum filtration, and further recrystallized with 7:3 etoac:water in a hot water bath and a second vacuum filtration.
Please help! thank u!
Homework Answers
During the process of diphenylacetylene, KOH is used.whichis corrosive, hence it is removed by washing with water
Add Answer to:
What is the purpose of adding water after cooling the reaction
mixture in this experiment?
I...
Write out your separation scheme for this experiment. 1. Heat 75 mL of water to 90...
Write out your separation scheme for this experiment. 1. Heat 75 mL of water to 90 °C in a 250-mL beaker. 2. While the water is being heated, place 250 mg of salicylic acid, 1 drop of 85% phosphoric acid and 0.5 mL of acetic anhydride in a test tube. Add a boiling chip to the mixture and gently shake it in order to mix the reactants. 3. Heat the tube in the beaker of water at 85 - 90...
this is the procedure of melting point experiment ( preparation acetanilid) I want the summarize of...
this is the procedure of melting point experiment
( preparation acetanilid) I want the summarize of this
procedure
EXPERIMENTAL PROCEDURE Measure 0.100 to 0.125 g of aniline (in dropper bottles near the balances) into a tared reaction tube from the microscale kit and record the weight to the nearest milligram. Add 2 mL of distilled water and 6 to 7 drops (an excess amount, 21 drops =1 mL) of acetic anhydride. Stir the mixture for about 4 minutes untiha solid...
What was the purpose of cooling your solution (of sodium benzoate and water), after adjusting the...
What was the purpose of cooling your solution (of sodium benzoate and water), after adjusting the pH with HCl? ----- (why would we need to cool the solution?) does it have any effect on the precipitation??
I understand that equivalents is the ratio of the # of moles of a reactant or...
I understand that equivalents is the ratio of the # of moles
of a reactant or reagent compared to the # of moles of the
substrate. But I am confused on how to answer this question and why
the procedure would call for more NaI than Vanillin if Vanillin is
the substance needed substituted. Can you help?
Thanks!
3. How many equivalents of sodium iodide are used in this experiment? Show your calculation Speculate about why the procedure calls for...
Explain what is the purpose of the following reagents/procedural steps in the synthesis of acetaminophen by...
Explain what is the purpose of the following reagents/procedural steps in the synthesis of acetaminophen by reacting p-aminophenol with acetic anhydride: a. Phosphoric acid b. Placing the reaction flask in warm water c. Purpose for placing crude product of acetaminophen in a 100 ml beaker with 20 ml of water, then heat it on a hot plate until crystals dissolves then let cool. Then having it in an ice bath for 20 min once crystals appeared. d. Drying product at...
Question- The second step is a name reaction. a) What is its name: b) Is it...
Question- The second step is a name reaction. a) What is its name: b) Is it OK that we left the reaction in our drawer over the week? What would have happened if we didn’t have a good seal on the stopper? Draw a possible reaction scheme. Background The field of medicinal chemistry combines the specialties of synthetic organic chemistry and biology, and biochemistry. Compounds are generated and biological activity is screened using target specific assays. . These assays are...
What is the purpose of adding sodium carbonate to the water-tea extract?Draw the general reaction equation...
What is the purpose of adding sodium carbonate to the water-tea extract?Draw the general reaction equation that results from the addition of the sodium carbonate. List one advantage and one disadvantage of shaking the separatory funnel during extraction List two different types of analyses that could be carried out to confirm the recrystallized solid is indeed caffeine List two different methods besides the one used in this experiment to isolate caffeine from tea.
numbers 3-5 please Those are the three equations given to us and that is the reaction...
numbers 3-5 please
Those are the three equations given to us and that is the reaction
mechanism as well as the procedure. there is nothing else i can
give you
EXPERIMENT 9: SYNTHESIS OF DIPHENYLACETYLENE Objective: Complete the two-step halogenation/elimination reaction sequence that converts an alkene (trans- stilbene) to an alkyne (diphenylacetylene) 3. Why is it important that the reaction is performed in the presence of a strong base? 4. If the starting mass is 350 mg of stilbene dibromide,...
Hello everyone! I am sorry in advance for so many questions. There is experimental procedure for...
Hello everyone! I am sorry in advance for so many questions. There is experimental procedure for benzocaine synthesis from p-aminobenzoic acid: 12 ml of ethanol and 0.9 g of p-aminobenzoic acid was added and stirred until dissolving after 1 ml of conc. H2SO4 was added. Then it was heated under reflux for 40 minutes and cooled, next the mixture was transferred into 250 ml flask with 30 g of ice and 30 ml of water and 10 ml of 10%...
That is the entire reaction and below is the question I need answered Reaction 3: Acetylation...
That is the entire reaction and below is the question I need
answered
Reaction 3: Acetylation NH2 NH2 (acetic anhydride) NH2 NH2 0-methylaniline NH2 m-methylaniline p-methylaniline HN o-methylaniline m-methylaniline 0 p-methylacetanilide Procedure for Reaction 3: 1) The solution of the three isomers of methylaniline in ethyl acetate was cooled to 0°C. 2) An equimolar amount of acetic anhydride to the quantity of p-methylaniline theoretically present in the solution was added dropwise with stirring. 3) The stirring was continued for 15...
this is the procedure of melting point experiment
( preparation acetanilid) I want the summarize of this
procedure
EXPERIMENTAL PROCEDURE Measure 0.100 to 0.125 g of aniline (in dropper bottles near the balances) into a tared reaction tube from the microscale kit and record the weight to the nearest milligram. Add 2 mL of distilled water and 6 to 7 drops (an excess amount, 21 drops =1 mL) of acetic anhydride. Stir the mixture for about 4 minutes untiha solid...
I understand that equivalents is the ratio of the # of moles
of a reactant or reagent compared to the # of moles of the
substrate. But I am confused on how to answer this question and why
the procedure would call for more NaI than Vanillin if Vanillin is
the substance needed substituted. Can you help?
Thanks!
3. How many equivalents of sodium iodide are used in this experiment? Show your calculation Speculate about why the procedure calls for...
numbers 3-5 please
Those are the three equations given to us and that is the reaction
mechanism as well as the procedure. there is nothing else i can
give you
EXPERIMENT 9: SYNTHESIS OF DIPHENYLACETYLENE Objective: Complete the two-step halogenation/elimination reaction sequence that converts an alkene (trans- stilbene) to an alkyne (diphenylacetylene) 3. Why is it important that the reaction is performed in the presence of a strong base? 4. If the starting mass is 350 mg of stilbene dibromide,...
That is the entire reaction and below is the question I need
answered
Reaction 3: Acetylation NH2 NH2 (acetic anhydride) NH2 NH2 0-methylaniline NH2 m-methylaniline p-methylaniline HN o-methylaniline m-methylaniline 0 p-methylacetanilide Procedure for Reaction 3: 1) The solution of the three isomers of methylaniline in ethyl acetate was cooled to 0°C. 2) An equimolar amount of acetic anhydride to the quantity of p-methylaniline theoretically present in the solution was added dropwise with stirring. 3) The stirring was continued for 15...
Most questions answered within 3 hours.
-
A shot-putter throws the shot with a horizontal velocity of 10
m/s and a
vertical velocity...
asked 9 minutes ago -
Mildred sells industrial-sized refrigeration units. Her
prospective buyer's face looks tense, and his forehead is wrinkled....
asked 11 minutes ago -
Clark Heter is an industrial engineer at Lyons Products. He
would like to determine whether there...
asked 1 hour ago -
3. Use a text editor to create a comma-delimited file of user
IDs and passwords. Revise...
asked 53 minutes ago -
Jensen and Associates has a projected balance
sheet that includes the following accounts. What is the...
asked 26 minutes ago -
implement a doubly-linked list in C. Each node in the linked list should contain a string,...
asked 49 minutes ago -
What are some best practices and things to avoid when developing
a PowerPoint presentation or file
asked 52 minutes ago -
Consider the ways that the government can get involved in
economic issues. What role do you...
asked 27 minutes ago -
Sodium carbonate is added to the tea mixture, in part, to form
the sodium salt of...
asked 50 minutes ago -
he plant started to purify its wastewater before discharging it
into the lake. How long will...
asked 1 hour ago -
Thiazyl fluoride, F3NS is a colourless gas. Using concepts of
electronegativity, formal charge etc. determine the...
asked 1 hour ago -
1. Why is an explicit inflation target a bad policy?
2. MV=PQ If M grows, then...
asked 45 minutes ago