Name:_______________________
Date:_____________________
Acids and Bases
1. Properties of Acids and Bases: compare and contrast using the Venn diagram.
Include: taste, electrical properties, solubility, pH, and examples.
Acids

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
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

Sour taste
 React with
Corrosive/non-corrosive
indicators
All acids dissolve in water to give  Are compounds
solutions which conduct electricity
 Release ions in
pH value below 7
solution
o
turn blue litmus paper red
 Form salt and
water when
acids dissolve in water to give hydrogen
combined
(H+) ions

Can
irritate or
corrodes metals
burn
skin
reacts with carbonates to produce CO2
Bases






Bitter taste
Slippery feel
Bases that dissolve in water give
solutions which conduct electricity
pH value above 7
o
turn red litmus paper blue
bases dissolve in water to give
hydroxide (OH-) ions
does not react with carbonates
2. pH
a) What does the pH scale measure?
 A measure of how acidic or basic a solution is in water
 Ranges from 0-14
b) What is NEUTRAL on the pH scale?
 7
c) What range do ACIDS have on the pH scale?
 Less than 7
d) What range do BASES have on the pH scale?
 Greater than 7
e) How much change does each step on the pH scale
mean in terms of H+ concentration?
 It is a logarithmic scale (10x)
 pH2 – pH1 = x

Each step has 10x higher (if towards pH=0) or less (if towards
pH=14) H+ concentration
Example: 6-3=3
103 = 10 * 10 * 10 = 1000
∴ (therefore), pH 3 is 1000 times more acidic than pH 6
f) On the scale at right, label some of the household products from the “Clothesline” activity
Examples: battery acid, coka cola, tomatoes, lemons, pepto bismol, eggs, bananas, urine, blood, water, baking soda, milk
of magnesia, Draino, oven cleaner, HCl, NaOh, sea water, root beer, bleach
Name:_______________________
Acids and Bases
Date:_____________________
3. Production of Ions

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Acids produce H+ when dissolved in solution; Bases produce OHTesting pH measures H+(aq) concentration
[H+] refers to the number of hydrogen ions in a specific volume of solution
When separate solutions containing H+ and OH- ions are combined, they react by
forming water: H+ + OH-  H2O