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7/29/2019 Acids & Bases & Acid Rain Copy
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Acids and Bases
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NOTESTopic:Acids/Bases
What are 4properties of acids?
What are 3properties of bases?
What is the pHscale?
What do thenumbers on the pHscale mean?
What are someeveryday uses ofacids and bases?
2-3 sentence summary
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What is an Acid?
An acid is a substance that tastes sour,
reacts with metals and carbonates, and
turns blue litmus paper red.
An acid is any substance that produces
hydrogen ions (H+) in water.
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NOTESTopic:Acids/Bases
What are 4properties of acids?
What are 3properties of bases?
What is the pHscale?
What do thenumbers on the pHscale mean?
What are someeveryday uses ofacids and bases?
2-3 sentence summary
Acids taste sour, react with metals and carbonates, and
turn blue litmus paper red. (NEVER TASTE ACHEMICAL WITHOUT PERMISSION!!)
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What is a Base?
A base is a substance that tastes bitter,
feels slippery, and turns red litmus
paper blue. A base is any substance that produces
hydroxide ions (OH) in water.
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NOTESTopic:Acids/Bases
What are 4properties of acids?
What are 3properties of bases?
What is the pHscale?
What do thenumbers on the pHscale mean?
What are someeveryday uses ofacids and bases?
2-3 sentence summary
Acids taste sour, react with metals and carbonates, and
turn blue litmus paper red. (NEVER TASTE ACHEMICAL WITHOUT PERMISSION!!)
Bases taste bitter, feels slippery, and turns redlitmus paper blue. (NEVER TASTE A CHEMICALWITHOUT PERMISSION!!)
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What is the pH scale?
Scientists use something called thepH scale to measure how acidic orbasic a liquid is.
The scale goes from 0 through 14.
Distilled water is 7 (right in the middle
neither an acid or a base).
Acids are found between 0 and 7. Bases are found from 7 to 14.
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Ammonia
Drain
cleaner
Most acidic
Most basic
0
1
23
76
5
4
8
9
1011
12
13
14
Hydrochloric
acid
LemonVinegar
Apple
Banana
Water
Baking
soda
Tomato
Milk
Blood
Soap
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NOTESTopic:Acids/Bases
What are 4
properties of acids?
What are 3properties of bases?
What is the pHscale?
What do thenumbers on the pHscale mean?
What are someeveryday uses ofacids and bases?
2-3 sentence summary
Acids taste sour, react with metals and carbonates, and
turn blue litmus paper red. (NEVER TASTE ACHEMICAL WITHOUT PERMISSION!!)
Bases taste bitter, feels slippery, and turns redlitmus paper blue. (NEVER TASTE A CHEMICALWITHOUT PERMISSION!!)
It measures how acidic or basic a solution is.
The scale goes from 0 through 14. Acids are foundbetween 0 and 7. Bases are found from 7 to 14.
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Uses of Acids and Bases
Acids and bases have many usesaround the home and in industry.
Acids: vitamin c, lemon juice
Bases: baking soda, ammonia
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NOTESTopic:Acids/Bases
What are 4
properties of acids?
What are 3properties of bases?
What is the pHscale?
What do thenumbers on the pHscale mean?
What are someeveryday uses ofacids and bases?
2-3 sentence summary
Acids taste sour, react with metals and carbonates, and
turn blue litmus paper red. (NEVER TASTE ACHEMICAL WITHOUT PERMISSION!!)
Bases taste bitter, feels slippery, and turns redlitmus paper blue. (NEVER TASTE A CHEMICALWITHOUT PERMISSION!!)
It measures how acidic or basic a solution is.
The scale goes from 0 through 14. Acids are foundbetween 0 and 7. Bases are found from 7 to 14.
Acids: vitamin c, lemon juiceBases: baking soda, ammonia
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Science Quick
Fact #23
Distilled water is
water that has all of
its impurities
removed throughdistillation.
Therefore, it will
always have a pH
level of 7 which is
neutral.
Distillation involves
boiling the water and re-condensing the steam into
a clean container, leaving
most if not all solid
contaminants behind.
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Science Trivia
What word means: the thickness of a liquid
and how slowly or quickly it will pour?
A. Velocity
B. Variety
C. Viscosity
D. Valencia
E. Volume
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Any Questions????Let s Begin!
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Today s Lab
One lab worksheet with columns that need
to be filled out and questions to be
answered.
Stations that include
a liquid (do not spill, touch, taste, or smell)
pH test strips
pH scale color indicator on the side on the
container
blue and red litmus paper
paper toweling
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Procedure You will work in groups offour
You will rotate around the room to each station At each station you will put down a sheet of paper
toweling
One member will test the liquid with a pH test strip.
One member will test the liquid using litmus paper One member will determine the pH number according
to the pH scale and the test strip color
One member will dispose of the used paper toweling
and strips
At the next station, you will follow the same steps, butrotate jobs as well.
All lab questions need to be answered individually ashomework.
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pH Test: match strip color to side
of tube ontainer
Litmus Paper Test:Blue Blue = BASE
Blue Red = ACIDRed Blue = BASE
Red Red = ACID
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Household Acids & Bases LabSolution Blue litmus Red litmus Universal
IndicatorpH
Vinegar
Ammonia Put drop ontoplate.
Unplug pHprobe
Lemon juice Add drop of
indicator.
When done.
Soft drink Record.
Drain cleaner Rinse outplate at end
Detergent of periodplease
Baking soda
Antacid (MoM)
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REVIEW
Is vinegar an acid or a base?
Baking soda?
What about lemon juice?
HCl? NaOH?
What is neutral (number and liquid?)
What do we use to test acidity? What scale do we use?
Red strip turning blue means what?
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Acid Rain: The Photo Story
Chemicals into the air
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chemicals + sun + water vapor =
acid!
http://rds.yahoo.com/_ylt=A0WTb_wY7VVHSAoA6EqjzbkF/SIG=12ckgroei/EXP=1196899992/**http://www.flickr.com/photos/izadsfotofactory/463899484/http://rds.yahoo.com/_ylt=A0WTb_wY7VVHSAoA6EqjzbkF/SIG=12ckgroei/EXP=1196899992/**http://www.flickr.com/photos/izadsfotofactory/463899484/http://rds.yahoo.com/_ylt=A0WTb_wY7VVHSAoA6EqjzbkF/SIG=12ckgroei/EXP=1196899992/**http://www.flickr.com/photos/izadsfotofactory/463899484/http://rds.yahoo.com/_ylt=A0WTb_wY7VVHSAoA6EqjzbkF/SIG=12ckgroei/EXP=1196899992/**http://www.flickr.com/photos/izadsfotofactory/463899484/7/29/2019 Acids & Bases & Acid Rain Copy
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AcidRain
http://rds.yahoo.com/_ylt=A0WTb_1h7lVHWRsBBwCjzbkF/SIG=122phosii/EXP=1196900321/**http://www.flickr.com/photos/mnw168/480692120/http://rds.yahoo.com/_ylt=A0WTb_1h7lVHWRsBBwCjzbkF/SIG=122phosii/EXP=1196900321/**http://www.flickr.com/photos/mnw168/480692120/http://rds.yahoo.com/_ylt=A0WTb_1h7lVHWRsBBwCjzbkF/SIG=122phosii/EXP=1196900321/**http://www.flickr.com/photos/mnw168/480692120/http://rds.yahoo.com/_ylt=A0WTb_1h7lVHWRsBBwCjzbkF/SIG=122phosii/EXP=1196900321/**http://www.flickr.com/photos/mnw168/480692120/http://rds.yahoo.com/_ylt=A0WTb_1h7lVHWRsBBwCjzbkF/SIG=122phosii/EXP=1196900321/**http://www.flickr.com/photos/mnw168/480692120/7/29/2019 Acids & Bases & Acid Rain Copy
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After the rain
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Why more
acid rain here?
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pH tolerance levels of freshwater animals
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The result
http://rds.yahoo.com/_ylt=A0WTb_0w8lVH0x0Bd26jzbkF/SIG=128ue2ris/EXP=1196901296/**http://www.flickr.com/photos/blackhellkat/132607653/7/29/2019 Acids & Bases & Acid Rain Copy
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Erosion of limestone and marble buildings
and statues
Acid
eroding
rock
http://rds.yahoo.com/_ylt=A0WTb_0w8lVH0x0Bd26jzbkF/SIG=128ue2ris/EXP=1196901296/**http://www.flickr.com/photos/blackhellkat/132607653/