Science - Acids and Bases

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The flashcards below were created by user mshowley on FreezingBlue Flashcards.


  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
  17. What is neutralisation?
    This is when an acid and a base react to produce a salt and water

    Acid + Base ------- Salt + Water
  18. What happens when an acid and a carbonate react together?
    It produces salt, water and carbon dioxide

    Acid + Carbonate ---- Salt + Water + Carbon Dioxide
  19. What is titration?
    This is a laboratory technique that is used to find out the exact volume of acid needed to neutralise a base

    Hydrochloric Acid + Sodium Hydroxide ----- Sodium Chloride + Water

    HCl + NaOH ----- NaCl + H20
  20. List examples of everyday neutralisation reactions
    1. Baking powder helps a cake mixture to rise

    2. Milk of Magnesia neutralises stomach acid to stop heartburn

    3. Toothpaste neutralises the plaque acid in our mouth

    4. Shampoo balances the acidity of hair

    5. Rubbing bicarbonate of soda on a bee sting neutralises the acidity of the sting

    6. Rubbing a dock leaf on a nettle sting neutralises the sting
  21. What happens when an acid and a metal react?
    It produces a salt and hydrogen gas

    Acid + Metal ---- Salt + Hydrogen Gas
  22. State how to test for hydrogen?
    Put a lit match to the top of the test tube with hydrogen in it and it will burn with a 'pop'

Card Set Information

Author:
mshowley
ID:
149999
Filename:
Science - Acids and Bases
Updated:
2017-01-02 23:59:51
Tags:
Acids Bases
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Description:
Acids and Bases
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