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WorksheetsFunctional groups II
Total questions: 26
Worksheet time: 7hrs 30mins
The compounds on the right part of the snippet are
Amides
Amines
Alcohols
Alkyl halydes
On vitamin C you can find the following functional groups
Aldehyde
Alkine
Alkene
Alcohol
Based on its structure (functional groups), you would expect vitamin C to
Be insoluble in water
Have a strong polar character
Not create H-bonds
Be considered as hydrohilic
Suppose the two molecules on the right are involved in meat decay, if you could simply protect the meat by passing a solvent and removing these two compounds, you would use
Water, because of the presence of two amine groups, can create H-bonds with water, making them soluble. You could simply rinse the meat with water and wash away these substances.
Water, because of the presence of two amine groups, they cannot create H-bonds with water, making them insoluble. You could simply rinse the meat with water and wash away these substances.
A non polar solvent (e.g. hexane) in which you could disolve the undesired amines and protect the meat.
What is the difference between the two molecules on the upper right corner?
The one at the top has 1 C less
The one at the bottom has 1 C less
The molecule at the bottom is not an amine
What information can you ascertain about the molecule lycopene (top left)
With most certainty it is a non polar compound
It would be soluble in a non polar solvent like hexane
It would be soluble in water
It can create dipole-dipole interactions
It can only create london forces
What functional groups can you identify on the molecule on the right side?
Alkyl halyde
Ether
Alcohol
Amine
Suppose the compound on the left is the sole responsible of the bitterness of coffee. When you prepare coffee in the morning, then
The drink would not be bitter, because the molecule is most likely not soluble on water
The drink would definitely be bitter, because the molecule is most likely very soluble on water
It doesn't matter because we don't know the polarity of the molecule
What groups can you identify in caffeine (right side)?
Amine
Ether
Alcohol
Alkene
Alkyl halide
Take a look at this table of analogous alcohols, the behavior described in it follows well our predictions:
Yes, because it shows that the longer the aliphatic part is, the higher the boiling point becomes.
Yes, because it shows that the longer the aliphatic part is, the lower the boiling point becomes.
No, because as the aliphatic part becomes bigger, there are stronger H-bonds between the molecule and water, reason why the sol. of C should be greater than that of A.
Yes, because as the aliphatic part becomes bigger, there are weaker H-bonds between the molecule and water, reason why the sol. of C should be greater than that of A.
The reason the solubility drops as the aliphatic chain size increases is:
The interaction between each molecule and water becomes less favorable because of the increasing size of the chain.
The interaction between each molecule and water becomes more favorable because of the increasing size of the chain.
In the case of molecules A and B, they can create H-bonds with water, whereas C only creates dipole-dipole interactions.
None of them creates H-bonds with water, and the solubiilty is only a parameter depending on temperature.
Suppose you have a flask with a mixture of A, B, and C. You start applying gentle heat to it. The order in which the substances would evaporate is expected to be:
1st: A, 2nd: B, 3rd: C
1st: C, 2nd: B, 3rd: A
1st: A and B: 2nd: A and B, 3rd: C
1st: B, 2nd: C, 3rd: A
The following molecule has an error, what is it?
There's no error here
The double bond on the left does not have hydrogens
The oxygen in the middle should be making 3 bonds
The C in the middle is making 5 bonds
The C in the middle is making 6 bonds
This molecule presents the functional group(s):
Alcohol
Ketone
Aldehyde
Alkene
Ether
The following functional groups are present here
Ketone
Aldehyde
Ether
Alcohol
Alkene
Is there any error in this molecule? (Write what is it in your notebook)
Yes
No
This is the R notation of a:
Ketone, but it has an extra H
Ketone, an it is fine
Aldeyhe, but it has a double bond C-O
Aldehyde, and it's fine
The insolubility of molecule A can be explained by:
The H-bonds that the molecule creates with water are much harder to establish because of the big groups in the molecule.
The H-bonds that the molecule creates with water are much easier to establish because of the big groups in the molecule.
The rings in A can create london forces with water and that's why it is soluble.
The rings in A assist in creating stronger H-bonds between the molecule and water
Suppose a tank ship has a spillage of these three molecules in a river. You would expect to see:
Molecule A as a film at the top of the water, with some of C, and B would not be seen.
Molecule C as a film at the top of the water, with some of B, and A would not be seen.
Both A and C would go to the end of the river, and B would be seen as a stain on the surface.
All of the molecules would solubilize and not be found by sight.
Select the correct conversion of this molecule into its skeletal formula
Which of the following molecules could you affirm that is NOT POLAR
All are polar
Which of the following molecules can create dipole-dipole interactions (at the most)
Based on its structure, we could say that this molecules has the following intermolecular forces:
(Remember the analogy of someone with 1$, versus someone with 1000$, versus someone with 1 million$)
H bonds
Dipole-dipole forces
London forces
Intramolecular forces
This is the structure of a binder. They are used in painting to hold the paint itself in place over the canvas. The n on the corner means this set of molecules is repeated many times (it is called a polymer). What type of paint would bind better with this binder?
An organic (non polar) one, since it can interact favorably with the binder.
A polar one, since it can interact favorably with the binder.
Either polar or non polar interacts favorably with the binder.
Draw in your notebook an aldehyde with the following requirements:
- Must have at least 20 carbons
- Must contain 6 C sp2
- Must contain at least 1 halogen
- Must be able to create H-bonds with other molecules of himself
Draw a molecule in your notebook that contains:
- 2 N atoms
- At least 15 C atoms
- Cannot create H-bonds with more molecules of itself.
- Contains 2 ketone groups
