Science - Acids and Bases

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  1. List the properties of acids
    Acids turn blue litmus paper red

    Acids have a pH less than 7

    Acids have a sour taste
  2. Give examples of acids
    • Lemon juice
    • Coke
    • Vinegar
    • Hydorchloric Acid
    • Sulphuric Acid
  3. List the properties of bases
    Bases turn red litmus paper blue

    Bases have a pH greater than 7

    Bases have a soapy feel
  4. State examples of bases
    • Toothpaste
    • Bleach
    • Washing soda
    • Sodium hydroxide
    • Calcium hydroxide
  5. What is an alkali?
    This is a base that dissolves in water eg. washing powder
  6. State the function (job) of an indicator
    To tell us if the solution is an acid or a base
  7. What is a neutral substance?
    These are substances that do not behave like acids or bases
  8. What is the pH Scale?
    This is used to measure the strength of an acid or a base
  9. State whether a solution is neutral, acidic or basic when a solution has a pH greater than 7
    Base
  10. State whether a solution of neutral, acidic or basic when a solution has a pH of 7
    Neutral
  11. State whether a solution is neutral, acidic or basic when a solution has a pH less than 7
    Acid
  12. State the two types of indicators?
    1. Litmus Indicator

    2. Universal Indicator
  13. What is litmus indicator?
    This will change colour if the solution is an acid or  a base

    It does not show how strong the acid or base is
  14. What colour change is observed when litmus paper is put into an acid?
    It changes from blue to red
  15. What colour change is observed when litmus paper is put into a base?
    It changes from red to blue
  16. What is universal indicator?
    This is a mixture of dyes that changes colour depending on how concentrated an acid or a base is

    It shows the pH of the acid or base
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149999
Card Set
Science - Acids and Bases
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Acids and Bases
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