1. what is an acid? what are the common properties? 2. what is a base? what are the common...
TRANSCRIPT
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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.
LET’S GET REAL
End
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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?
TYING IT ALL TOGETHER
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WHAT DO ALL OF THESE ATHLETES HAVE IN COMMON?
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GILBERT LEWIS
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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 LEARNING TARGET
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Why did acids and bases cause Gilbert Lewis to kill himself?
TODAY’S FOCUS QUESTION
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Popcorn read the reading you picked up.Read it aloud and answer the questions
once you are done.
ACID/BASE READING
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What is an Arrhenius acid?What is an Arrhenius base?What is a Bronsted-Lowry acid?What is a Bronsted-Lowry base?
RECALL
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ARRHENIUS ACIDS/BASES
An Arrhenius acid gives a H+ to a solution in an acid/base reactionAn Arrhenius acid will have a H in its chemical compound (e.g. HCl, HNO3, H2SO4, etc.)
An Arrhenius base gives an OH -
to a solution in an acid/base reactionAn Arrhenius base will have an OH in its chemical compound (e.g. NaOH, KOH, Ca(OH)2, etc.).
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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.
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Label the acid and base in this reaction, determine whether it is Arrhenius, Bronsted-Lowry, or both
HCl + H2O H3O+ + Cl-
TABLE TALK
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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.
LEWIS ACIDS AND BASES
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Label the Lewis acid and the Lewis base in the following reaction:
BF3 + F- BF4
-
CLASS EXAMPLE
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Label the Lewis acid and base in the following reaction. Could it also be Arrhenius and/or Bronsted-Lowry?
H+ + NH3 NH4+
CLASS EXAMPLE
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Label the Lewis acid and the Lewis base in the following reaction:
BF3 + NH3 BF3NH3
TABLE TALK
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Label each reactant as either a Lewis acid or a Lewis base.
AlCl3 + F- AlCl4
-
STOP AND JOT
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SUMMARIZE
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Competing with your tableAnswer 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 RACES
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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. H2CO3 + H2O HCO3
- + H3O+
2. HF + H2O F- + H3O+
3. BF3 + F - BF4-
4. HCl + NH3 NH4+ + Cl -
5. List all of the strong bases6. List all of the strong acids
RELAY RACE QUESTIONS
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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 LEARNING TARGET
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Begin working on your homeworkThere will be an exit slip after this
WORK TIME
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LEARNING LOG ASSESSMENT
Rate yourself 1 – 4 on LT 6.7
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1. For the following reactions, identify the reactants as Arrhenius acids/bases, Bronsted-Lowry acids/bases, and/or Lewis acids/bases:
a. NaOH + HCl H2O + + NaCl
b. BF3 + F- BF4
-
EXIT SLIP
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LEARNING LOG ASSESSMENT
Using your exit slip score, re-rate yourself on LT 6.7
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Exam next Thursday/Friday1st character evaluation and awards next Thursday/Friday
1st binder check next Thursday/Friday
CLOSING TIME