acids & bases & acid rain copy

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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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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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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What are 4

properties of acids?









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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What are 4

properties of acids?









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/


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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/


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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/


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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/

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