ACIDS, BASES, & pH MAIN IDEAS 1.ACIDS 2.BASES 3.pH SCALE 4.BUFFERS Objective SWBAT explain the...
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Transcript of ACIDS, BASES, & pH MAIN IDEAS 1.ACIDS 2.BASES 3.pH SCALE 4.BUFFERS Objective SWBAT explain the...
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
Polar Water molecules can react to form ions
hydrogenion
hydroxideion
Hydrogen & Hydroxide Ions form when water molecules are broken apart.
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
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
A. pH > 7 (Larger # = Stronger Base)B. Taste bitter, burn skin, feels slippery,
Turns litmus BLUE
II. Bases / Alkalinity
C. Bases dissolve in H2O to produce Hydroxide ions.
NaOH Na+ + OH-
Sodium Hydroxid
e
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
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
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
pH Scale
Increasing Strength
Neutral
Increasing Strength
Turn you IaN sideways & use the WHOLE page on IaN pg. 36