Chris Mauer
CHM 2210 – Organic Chemistry 1
cmauer2014@fau.edu
SI Hours:
Mon: 5:30pm – 6:20pm
*Tue: 6:00pm – 6:50pm
Wed: 3:00pm – 3:50pm
OC2 Hours:
Mon: 12:00pm – 3:00pm
Wed: 6:00pm – 8:00pm
SI Chapter 3 Handout
Lewis Acids and Bases vs Bronsted-Lowry Acids and Bases
Complete the acid and base definitions below by filling in the term “acceptor” or “donator”
as applicable.
Lewis Definition
Bronsted-Lowry Definition
Acid:
Electron____________________
Acid:
Proton____________________
Base:
Electron____________________
Base:
Proton____________________
(T/F) All Bronsted Acids are Lewis Acids.
(T/F) All Lewis Acids are Bronsted Acids.
Label each of the following molecules as either a Lewis acid or a Lewis base.
Acid-Base Curved Arrow Mechanisms
Complete the Lewis Acid-Base Reactions shown below. Include the curved arrow
mechanism and label the acid, base, and any formal charges (If not already indicated).
1
Chris Mauer
CHM 2210 – Organic Chemistry 1
cmauer2014@fau.edu
SI Hours:
Mon: 5:30pm – 6:20pm
*Tue: 6:00pm – 6:50pm
Wed: 3:00pm – 3:50pm
OC2 Hours:
Mon: 12:00pm – 3:00pm
Wed: 6:00pm – 8:00pm
Complete the Bronsted-Lowry Acid-Base Reactions shown below. Include the curved
arrow mechanism and label the acid, base, conjugate acid, conjugate base, and any formal
charges (If not already indicated).
How to Determine Acid/Base Strength
The stronger the acid the ___________ its conjugate base.
The stronger the acid the ___________ its pKa
Effect of Charge:
How does charge affect acidity? How does it affect basicity?
Circle the stronger acid in each pair below:
Circle the stronger base in each pair below:
2
Chris Mauer
CHM 2210 – Organic Chemistry 1
cmauer2014@fau.edu
SI Hours:
Mon: 5:30pm – 6:20pm
*Tue: 6:00pm – 6:50pm
Wed: 3:00pm – 3:50pm
OC2 Hours:
Mon: 12:00pm – 3:00pm
Wed: 6:00pm – 8:00pm
ARIO:
What is ARIO and why is it important?
Aspect 1: A_________________
Circle the stronger acid in each pair below:
Circle the stronger base in each pair below:
Aspect 2: R_________________
Circle the stronger acid in each pair below:
Circle the stronger base in each pair below:
3
Chris Mauer
CHM 2210 – Organic Chemistry 1
cmauer2014@fau.edu
SI Hours:
Mon: 5:30pm – 6:20pm
*Tue: 6:00pm – 6:50pm
Wed: 3:00pm – 3:50pm
OC2 Hours:
Mon: 12:00pm – 3:00pm
Wed: 6:00pm – 8:00pm
Aspect 3: I_________________
Circle the stronger acid in each pair below:
Circle the stronger base in each pair below:
Aspect 4: O_________________
Circle the stronger acid in each pair below:
Circle the stronger base in each pair below:
Aspects Summary
A_________ R________
I________
O_______
4
Chris Mauer
CHM 2210 – Organic Chemistry 1
cmauer2014@fau.edu
SI Hours:
Mon: 5:30pm – 6:20pm
*Tue: 6:00pm – 6:50pm
Wed: 3:00pm – 3:50pm
OC2 Hours:
Mon: 12:00pm – 3:00pm
Wed: 6:00pm – 8:00pm
Rank the following acids in order of decreasing acidity:
Acid-Base Equilibrium
Acid-base reactions are under ______________ control, so what side does the reaction
favor?
Complete the following reactions. Circle the favored side and state whether the reaction is
favorable in the forward direction.
5
Chris Mauer
CHM 2210 – Organic Chemistry 1
cmauer2014@fau.edu
SI Hours:
Mon: 5:30pm – 6:20pm
*Tue: 6:00pm – 6:50pm
Wed: 3:00pm – 3:50pm
OC2 Hours:
Mon: 12:00pm – 3:00pm
Wed: 6:00pm – 8:00pm
Gibb’s Free Energy and Leveling Effect
(T/F) When the ∆G° (standard free-energy change) is < 0 then the reaction is spontaneous
and favorable.
For each reaction below, determine if the ∆G° for the reaction in the forward direction will
be negative or positive. How about the Keq? Would the reaction be spontaneous?
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