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Acids and Bases . What is an Acid . An acid is a compound that increases the number of hydrogen ions when dissolved in w ater. Hydrogen Ion = H + For example when HCl (Hydrochloric ACID ) is dissolved in water ….. You will get H + ion and a Cl - ion. Why ? . H +. Cl -. . . - PowerPoint PPT Presentation
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ACIDS AND BASES
WHAT IS AN ACID An acid is a compound that increases the number of hydrogen ions when
dissolved in water.
Hydrogen Ion = H+
For example when HCl (Hydrochloric ACID) is dissolved in water …..
You will get H+ ion and a Cl- ion. Why ?
.
H+
H+
H+
H+
H+
H+H+
H+
Cl-
Cl-Cl-
Cl-Cl-
Cl-
Cl-
The extra H+ ions give a specific solution its acidic properties
H+ ions will bond with H2O to form a molecule called Hydronium.
ACIDS IN OUR LIVESAscorbic acid (Vitamin C)
Anti Oxidant , Immune system ,antihistamine
CARBONIC ACID H2CO3
When carbon dioxide dissolves in water producing carbonic acid:CO2 + H2O H2CO3
Allows our Bodies to transport CO2 to our lungs
FROM THE MONTREAL GAZETTE 1985
STOMACH ACID (HCL) AND SULFURIC ACID (H2SO4)
WHAT IS A BASE A base is any compound that increases the number of hydroxide ions (OH-)
when mixed with water
For example NaOH will dissolve in water to create a solution with Basic Properties
OH-
Na+
Na
OH-
OH-
OH-OH-
OH-
Na+Na+
Na+
Bases are used in soaps
Bases are used to make paper, in oven cleaners, and to unclog drains
Ammonia is a base and is used in many household cleaners
THE PH SCALEWith the exception of distilled water almost everything is an
Acid or a Base. pH or “ Power of Hydrogen” tells us the concentration of H+
ions in solution.
The pH scale measures how acidic or basic a substance is.
The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value.
QUESTION #1Lemon juice
has a pH of 2.2. Is it an acid or a base?
QUESTION #2Detergents
such as Tide have a pH of about 10. Is Tide an acid or a base?
QUESTION #3Seawater has
a pH of 8.2. Is seawater an acid or a base?
QUESTION #4The inside of
your mouth has a pH of 7. Is it an acid or a base?
YOUR HOMEWORK1. Partner Up 2. Determine who will do acid / base
Determine at LEAST 3 properties of an Acid or Base look online via Google
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