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    Acids and Bases

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    mojicaashley07

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    Acids and Bases

    Uploaded by

    mojicaashley07
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    Acids and Bases Ppt

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    33 views15 pages

    Acids and Bases

    Uploaded by

    mojicaashley07

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
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    Acids & Bases

    They are everywhere..


    In your food
    In your house
    EVEN IN YOU!!!!!
    Classify the following properties of element whether
    for metal or nonmetal.

    METAL 1. Malleable
    NONMETAL 2. Brittle
    METAL 3. Ductile
    NONMETAL 4. Poor conductors
    METAL 5. Good conductors
    METAL 6. Lustrous (shiny)
    NONMETAL 7. Have LOW melting point
    METAL 8. Very dense
    NONMETAL 9. Dull
    METAL 10. Corrosive
    What is an acid?
     It comes from the Latin word acidus
    that means "sharp" or "sour".
     The more H + ions, the more acidic
    the solution.
    Properties of an Acid
     Tastes Sour
     Conduct Electricity
     Corrosive, which means they
    break down certain
    substances. Many acids can
    corrode fabric, skin,and paper
     Some acids react strongly with
    metals
     Turns blue litmus paper red

    Picture from BBC Revision Bites


    http://www.bbc.co.uk/schools/ks3bitesize/science/chemistry/acids_b
    ases_1.shtml
    Uses of Acids
     Acetic Acid = Vinegar
     Citric Acid = lemons, limes, &
    oranges. It is in many sour
    candies such as lemonhead &
    sour patch.
     Ascorbic acid = Vitamin C which
    your body needs to function.
     Sulfuric acid is used in the
    production of fertilizers, steel,
    paints, and plastics.
     Car batteries
    What is a base?

     A base is a solution that has an


    excess of OH- ions.
     Another word for base is alkali.
     Bases are substances that
    can accept hydrogen ions
    Properties of a Base
     Feel Slippery
     Taste Bitter
     Corrosive
     Can conduct electricity. (Think
    alkaline batteries.)
     Do not react with metals.
     Turns red litmus paper blue.
    Uses of Bases
     Bases give soaps, ammonia, and
    many other cleaning products some
    of their useful properties.
     The OH- ions interact strongly with
    certain substances, such as dirt and
    grease.
     Chalk and oven cleaner are
    examples of familiar products that
    contain bases.
     Your blood is a basic solution.
    pH Scale
     pH is a measure of how acidic or basic a
    solution is.
    • The pH scale ranges from 0 to 14.
     Acidic solutions have pH values below 7
     A solution with a pH of 0 is very acidic.
     A solution with a pH of 7 is neutral.
    • Pure water has a pH of 7.
    • Basic solutions have pH values above 7.
    pH Scale
    • A change of 1 pH unit represents a tenfold
    change in the acidity of the solution.
    • For example, if one solution has a pH of 1 and
    a second solution has a pH of 2, the first
    solution is not twice as acidic as the second—
    it is ten times more acidic.
    Classify the following SOLUTION whether for ACID or
    BASE.

    BASE 1. Sea water (8.0)


    BASE 2. Baking Soda (9.1)
    ACID 3. Lemon Juice (2.2)
    ACID 4. Urine (6.0)
    BASE 5. Blood (7.4)
    BASE 6. Bleach (13.0)
    ACID 7. Tomato Juice (4.2)
    ACID 8. Coffee (5.1)
    BASE 9. Soap (12.3)
    ACID 10. Orange juice (3.0)
    Acid – Base Reactions
     A reaction between an
    acid and a base is
    called neutralization.
    An acid-base mixture
    is not as acidic or
    basic as the individual
    starting solutions.
    Acid – Base reactions

     Each salt listed in this table can be


    formed by the reaction between an
    acid and a base.

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