acids, bases, & ph main ideas 1.acids 2.bases 3.ph scale 4.buffers objective swbat explain the...
DESCRIPTION
I. Acids I. Acids/ Acidity A.pH < 7 (Smaller # = Stronger Acid) B. Taste sour, burn skin, react with carbonate (CO 3 ), react with metals producing H 2, Turns litmus paper REDTRANSCRIPT
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ACIDS, BASES, & pHMAIN IDEAS1. ACIDS2. BASES3. pH SCALE4. BUFFERS
ObjectiveSWBAT explain the properties of acids and bases
utilizing indicators with the pH scale
to identify & define them.
IaN pg. 37
Don't find fault, find a remedy.- Henry
Ford
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Polar Water molecules can react to form ions
hydrogenion
hydroxideion
Hydrogen & Hydroxide Ions form when water molecules are broken apart.
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I. Acids/ AcidityA. pH < 7 (Smaller # = Stronger
Acid)
B. Taste sour, burn skin, react with carbonate (CO3), react with
metals producing H2, Turns litmus paper RED
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C. Acids produce a H+ ions in reactions.1.
2. Acids Ionize H2O producing Hydronium
ionsH+ + H2O H30+
HCl H+ + Cl-Hydrochloric Acid
PRODUCTS
REACTANTS
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A. pH > 7 (Larger # = Stronger Base)B. Taste bitter, burn skin, feels slippery,
Turns litmus BLUE
II. Bases / Alkalinity
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C. Bases dissolve in H2O to produce Hydroxide ions.
NaOH Na+ + OH-
Sodium Hydroxid
e
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Strongly Acidic
Strongly Basic
Neutral
III. pH Scale
• pH < 7 = acid and pH > 7 = baseMeasures concentration of Hydroxide & Hydronium Ions
OH- H30+
• pH of 7 has equal numbers of H+ and OH- ions so it is neutral
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Buffers• Cells in human body need
to maintain a pH between 6.5 and 7.5• Buffers help prevent sharp
changes in pH• Buffers are weak acids and
weak bases
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IV. Neutralization Reactions
1. Upset Stomach = Increased stomach acid
Antacid = BASE (TUMS) Stomach Acid + Tums (Base) WATER +
Salt
A. Mixtures of Acids & Bases produces neutral solutions (When their strengths are similar!)
PRODUCTS
REACTANTS
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pH Scale
Increasing Strength
Neutral
Increasing Strength
Turn you IaN sideways & use the WHOLE page on IaN pg. 36