F or a species to act as a Brønsted base, an atom in the species must possess a lone pair of electrons. Explain why this is so.
Expert Solution & Answer
Interpretation Introduction
Interpretation: For a species to act as Bronsted base, an atom in the species must possess a lone pair of electrons has to be explained.
Concept Introduction: Bronsted's definition is based on the chemical reaction that occurs when both acids and bases are added with each other. In Bronsted's theory acid donates proton, while base accepts proton from acid resulting in the formation of water.
Example: Consider the following reaction.
HCl+NH3→NH4++Cl-
Hydrogen chloride donates a proton, and hence it is a Bronsted acid. Ammonia accepts a proton, and hence it is a Bronsted base.
To Explain: why an atom in species must possess lone pair of electrons, for the species to act as Bronsted base.
Answer to Problem 16.1QP
Answer
The atom in a species must possess lone pair of electrons to act as Bronsted base because Bronsted base is
H+ acceptor.
Explanation of Solution
To explain Bronsted base
Bronsted base is the one which can accept proton to form a conjugated acid.
To explain why lone pair is must
If a lone pair of electron is present, the species can accept proton. This is because the Bronsted base accepts a proton to form conjugate acid. Therefore lone pair of electron is must for a species to act as Bronsted base.
Conclusion
The necessity of presence of lone pair of electrons in an atom for a species to act as Bronsted base was explained.
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How many signals do you expect in the H NMR spectrum for this molecule?
Br Br
Write the answer below.
Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H
atoms that would contribute to the same signal as the H already highlighted red
Note for advanced students: In this question, any multiplet is counted as one signal.
1
Number of signals in the 'H NMR spectrum.
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to
the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
Check
For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute
to the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
O
✓
No additional Hs to color in top
molecule
ง
No additional Hs to color in bottom…
in the kinetics experiment, what were the values calculated? Select all that apply.a) equilibrium constantb) pHc) order of reactiond) rate contstant
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