neutralize em! december √100, 2.009 *10 3 objective: swbat predict the products of acid-base...
TRANSCRIPT
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
Agenda
Do Now/Announcements Finish pH calculations Finish Lab Analysis Ionization Equations Neutralization Reactions Work Time Exit Ticket
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
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?
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??
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+
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!
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!
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
Neutralization Reactions
Write the balanced chemical reaction for hydrochloric acid and Sodium Hydroxide
HCl + NaOH →NaCl + H2O
ACID BASE
SALT WATER
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
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-
Ionization Equations
Write the ionization equation for the dissociation of the following acids and bases:
Sulfuric Acid (H2SO4)
Barium Hydroxide
Ionization Equations
Write the ionization equation for the dissociation of the following acids and bases:
Nitric Acid (HNO3)
Ammonium Hydroxide
Practice!
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?