1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
satela [25.4K]
3 years ago
5

Write a mechanism for the esterification of propanoic acid with 18O-labeled ethanol. Show clearly the fate of the 18O label. (b)

Acid-catalyzed hydrolysis of an unlabeled ester with 18O-labeled water (H218O) leads to incorporation of some 18O into both oxygens of the carboxylic acid product. Explain by a mechanism. (Hint: You must use the fact that all steps in the mechanism are reversible.)
Chemistry
1 answer:
tatuchka [14]3 years ago
5 0

Answer:

See explanation and images attached

Explanation:

a) In the mechanism for the acid catalysed esterification of propanoic acid using ethanol, we can see that the first step is the protonation of the acid followed by nucleophillic attack of the alcohol. Loss of water and consequent deprotonation regenerates the acid catalyst. We can see the fate of the 18O labelled ethanol in the mechanism shown.

b)  In the second mechanism, an unnamed ester is hydrolysed using an acid catalyst. The attack of the acid and subsequent nucleophillic attack of water labelled with 18O leads to the incorporation of this 18O into the product acid as shown in the mechanism attached to this answer.

You might be interested in
How many moles of oxygen gas can 0.882 mol of hydrogen peroxide produce if decomposition is complete? 2H2O2 (l) → 2H2O(l) + O2(g
andreyandreev [35.5K]
We are given the chemical reaction and the amount of reactant used for the process. We use these data together to obtain what is asked. We do as as follows:

0.882 mol H2O2 ( 1 mol O2 / 2 mol H2O2 ) = 0.441 mol O2 produced

Hope this answers the question.
5 0
3 years ago
Read 2 more answers
What is the ph of a solution that has a poh of 11.24
galina1969 [7]
Always remember that pH + pOH = 14 
Here, you have a pOH of 11.24, so  you replace it in the equation, and u get:
pH + 11.24 = 14

Then, You move 11.24 to the other part. and moving from a part to another change the sign of the equation. And you get:
pH = 14 - 11.24 = 2.76

So, the pH of a solution that has a pOH of 11.24 is pH = 2.76

Hope this Helps :)
7 0
3 years ago
An electron has the properties of a _____ and ______
Dennis_Churaev [7]

Answer:

mass, and spin

Explanation:

8 0
3 years ago
23.9 km + 15 km
Ugo [173]

Answer:

the original answer is 38.9km (3sf)

4 0
3 years ago
The oxidation number of all the element in free state is 0​
Art [367]

Answer:

Zero-Nine

Explanation:

this is becasue these numbers are rather small and if you plug these numbers into an equation you will most likely get 0.

8 0
3 years ago
Other questions:
  • A 52.0 mL volume of 0.25 M HBr is titrated with 0.50 M KOH. Calculate the pH after addition of 26.0 mL of KOH at 25 ∘C.
    14·1 answer
  • What is an example of convection in earths system
    11·1 answer
  • Match the following words with their definitions.
    12·1 answer
  • Rank the three elements according to their ionization energy,
    5·1 answer
  • If you stirred some sugar in water the sugar would disappear but the water would taste sweet. This is because __________ change
    12·1 answer
  • Which is a characteristic of a mixture?
    12·1 answer
  • An unknown liquid has a mass of 22.1 g
    9·1 answer
  • *multiple choice*
    5·1 answer
  • Why is photosynthesis important?
    9·2 answers
  • Why wasn’t sodium hydroxide used in the synthesis of divanillyl oxalate, instead of triethylamine?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!