neutralize em! december √100, 2.009 *10 3 objective: swbat predict the products of acid-base...
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Neutralize Em!December √100, 2.009 *103
Objective: SWBAT predict the products of acid-base neutralization reactions
Catalyst: Write down the balanced equation for the reaction of Sodium Chloride with Aluminum Oxide
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Agenda
Do Now/Announcements Finish pH calculations Finish Lab Analysis Ionization Equations Neutralization Reactions Work Time Exit Ticket
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Hmmm…Acid inside of me?
The human stomach produces hydrochloric acid (HCl), commonly known as "stomach acid“ or “stomach juice”
Stomach acid is made when you eat something, but when a person eats something requiring the stomach to work EXTRA hard—say, a pizza—the stomach may generate EXCESS hydrochloric acid, and the result is HEARTBURN
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Inside your insides…the human stomach
When this happens, people often take antacids, which contain chemicals such as…
aluminum hydroxide (Al[OH]3)
ormagnesium
hydroxide (Mg[OH]2)
What do these chemicals have in common?
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THEY ARE BASES!!!!!! DUH Mr. Jhaveri!
True…taking an antacid when there is excess acid in your stomach neutralizes the acid.
HCl + Al(OH)3 →
We learned about 5 types of reactions…What type of reaction is this??
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FLASHBACK!!!!!!!
A double-replacement reaction is one in which ions switch places.
AX + BY AY + BX Two couples are dancing and decide to switch
partners!
Example: MgO + CaS
SOMg Ca
+O S
Mg Ca+
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Back to Reality…
THEY ARE BASES!!!!!! DUH Mr. Jhaveri!
True…taking an antacid when there is excess acid in your stomach neutralizes the acid.
HCl + Al(OH)3 →We just turned that aggressive acid into neutral old water…
AlCl3 + H2O
So, What will be the products of this reaction? DON’T FORGET TO KRISS KROSS!
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Back to Reality…
THEY ARE BASES!!!!!! DUH Mr. Jhaveri!
True…taking an antacid when there is excess acid in your stomach neutralizes the acid.
HCl + Al(OH)3 →We just turned that aggressive acid into neutral old water…
AlCl3 + H2O
So, What will be the products of this reaction? DON’T FORGET TO KRISS KROSS!
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Neutralization!
KEY POINT #1: A neutralization reaction is a double-replacement reaction in which an acid and a base react in to produce water and a salt
Now…A salt is NOT just NaCl (table salt…) A salt is an ionic compound made up of a
cation from a base and an anion from an acid
Acid + Base Water + Salt HY + X(OH) H2O + XY DON’T FORGET
TO KRISS-KROSS!!!!
ACID BASE SALTWATER
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Neutralization Reactions
Write the balanced chemical reaction for hydrochloric acid and Sodium Hydroxide
HCl + NaOH →NaCl + H2O
ACID BASE
SALT WATER
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Ionization Equations
What happens if we just place an acid or base in water?
It Ionizes, or breaks up into ions
Key Point #2: An ionization equation shows the ions that result when an acid or base is dissolved in water
H+
(SO4)2-
H+
H2SO4
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Ionization Equations
Key Point #3: An ionization equation shows the cation (+) and anion (-) that result when an acid or base dissociates when dissolved in water
H2SO4
How do we know that H2SO4 becomes H+ and (SO4)2-?
Because it is an ionic compound! We had to Kriss Kross to get the subscripts!
H+
(SO4)2-
H+
H2SO4
2H+ + (SO4)2-
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Ionization Equations
Write the ionization equation for the dissociation of the following acids and bases:
Sulfuric Acid (H2SO4)
Barium Hydroxide
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Ionization Equations
Write the ionization equation for the dissociation of the following acids and bases:
Nitric Acid (HNO3)
Ammonium Hydroxide
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Practice!
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Exit Ticket
Write the balanced equation for the following acid-base neutralization Lithium hydroxide and Hydrochloric Acid
If you take a Tums with 4.5x10-5M [OH-] and there is 5.5x10-9 M [H+] will all of the acid be neutralized?