LET’S GET REAL
1. What is an acid? What are the common
properties?
2. What is a base? What are the common
properties?
3. List 4 strong acids.
End
T YING IT ALL TOGETHER
Previous Exit Slip Problems:
1. What are two properties of an acid ?
2. What is an Arrhenius acid ?
3. What makes something a strong or weak base?
WHAT DO ALL OF THESE
ATHLETES HAVE IN COMMON?
GILBERT LEWIS
TODAY’S LEARNING TARGET
 6.7 – I can discuss the differences between
Arrhenius, Bronsted-Lowry, and Lewis
acids/bases. I can identify a compound as being
one or more of the following.
TODAY’S FOCUS QUESTION
 Why did acids and bases cause Gilbert Lewis to
kill himself?
ACID/BASE READING
 Popcorn read the reading you picked up.
 Read it aloud and answer the questions once you
are done.
RECALL
What
What
What
What
is
is
is
is
an Arrhenius acid?
an Arrhenius base?
a Bronsted-Lowry acid?
a Bronsted-Lowry base?
ARRHENIUS ACIDS/BASES
 An Arrhenius acid gives a H + to a
solution in an acid/base reaction
An Arrhenius acid will have a H in its
chemical compound (e.g. HCl, HNO 3,
H 2SO 4, etc.)
 An Arrhenius base gives an OH - to a
solution in an acid/base reaction
An Arrhenius base will have an OH
in its chemical compound (e.g.
NaOH, KOH, Ca(OH) 2, etc.).
BRONSTED-LOWRY
ACIDS/BASES
 Refined Arrhenius’ theory of
acids/bases
 Bronsted-Lowry Acid – Donate
(give) a H + to solution
 Bronsted-Lowry Acid – Accept
(take) a H + from solution.
 All Arrhenius acids/bases are
Bronsted-Lowry acids/bases,
but not all Bronsted-Lowry
acids/bases are Arrhenius
acids/bases.
TABLE TALK
Label the acid and base in this reaction,
determine whether it is Arrhenius,
Bronsted-Lowry, or both
HCl + H 2 O  H 3 O + + Cl -
LEWIS ACIDS AND BASES
To be an acid/base, a molecule does not
necessarily have to contain H + .
Lewis acid – An atom, ion, or molecule that
accepts an electron pair to form a covalent
bond.
Lewis base – An atom, ion, or molecule that
donates an electron pair to form a covalent
bond.
Therefore, acid/base reactions are ultimately
about the transfer of electrons.
CLASS EXAMPLE
Label the Lewis acid and the Lewis base
in the following reaction:
BF 3 + F -  BF 4-
CLASS EXAMPLE
Label the Lewis acid and base in the
following reaction. Could it also be
Arrhenius and/or Bronsted-Lowry?
H + + NH 3  NH 4+
TABLE TALK
Label the Lewis acid and the Lewis base
in the following reaction:
BF 3 + NH 3  BF 3NH 3
STOP AND JOT
Label each reactant as either a Lewis
acid or a Lewis base.
AlCl 3 + F -  AlCl 4-
SUMMARIZE
RELAY RACES
 Competing with your table
 Answer the questions one at a time. EVERYONE
MUST ANSWER QUESTIONS WHEN IT IS THERE
TURN.
 Next group member should check previous
answer before moving on.
RELAY RACE QUESTIONS
For 1-4, label the acid and base in each of the
reactions and say whether it is Arrhenius,
Bronsted-Lowry, and/or Lewis. It can be a
combination of all of these.
1. H 2 CO 3 + H 2 O  HCO 3 - + H 3 O +
2. HF + H 2 O  F - + H 3 O +
3. BF 3 + F -  BF 4 4. HCl + NH 3  NH 4 + + Cl 5. List all of the strong bases
6. List all of the strong acids
TODAY’S LEARNING TARGET
 6.7 – I can discuss the differences between
Arrhenius, Bronsted-Lowry, and Lewis
acids/bases. I can identify a compound as being
one or more of the following.
WORK TIME
Begin working on your homework
There will be an exit slip after this
LEARNING LOG
ASSESSMENT
Rate
yourself
1 – 4 on
LT 6.7
EXIT SLIP
1. For the following reactions, identify the
reactants as Arrhenius acids/bases,
Bronsted-Lowry acids/bases, and/or
Lewis acids/bases:
a. NaOH + HCl  H 2O + + NaCl
b. BF 3 + F -  BF 4-
LEARNING LOG
ASSESSMENT
Using your
exit slip
score, rerate
yourself
on LT 6.7
CLOSING TIME
Exam next Thursday/Friday
1 st character evaluation and awards next
Thursday/Friday
1 st binder check next Thursday/Friday