chem sac

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Author:
bridgit
ID:
37930
Filename:
chem sac
Updated:
2010-10-05 02:39:22
Tags:
chem
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Description:
chem exam/ test
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  1. What is unique to acids?
    • taste sour
    • Have a relatively low PH
    • Turn litmus red
  2. What is unique to bases?
    • Turn litmus blue
    • Have a slippery feel
    • Are causic
    • Have a relatively high PH
  3. Reaction type 1
    Acid+ reactive metal -> salt + hydrogen
  4. Reaction type 2
    Acid + metal hydroxide -> salt + water
  5. Reaction type 3 (acid rain)
    Acid + Metal oxide -> salt + water
  6. Reaction type 4
    Acid + metal carbonate -> salt + water + carbon dioxide
  7. Reaction type 5
    Acid + metal hydrogen carbonate -> salt + water + carbon dioxide
  8. Reaction type 6
    Acidic oxide + base -> salt + water
  9. What is an ionic chemical equation?
    Deleteing spectator ions
  10. What is the Bronsted-Lowry theory
    • Acids are proton donors
    • Bases are proton acceptors
  11. What are amphiprotic substances?
    • Can act as either acids or bases depending on what they are reacting with.
    • Can donate or receive protons
  12. What makes strong acids and bases?
    • When they ionise completely
    • Donates/accepts protons easily
  13. What makes weak acids and bases?
    • Doesn't ionise completely
    • Doesn't donate/ accept protons easily
  14. What are polyprotic acids?
    Able to donate more than one proton from each molecule.
  15. pH to H+ = ?
    10^-pH
  16. H+ to OH- = ?
    /10^-14
  17. H+ to pH = ?
    -log
  18. Note
    Don't use in excess use limiting reagent
  19. Molar ratio?
    What you what to find out over what you want to find out
  20. calculations.
    • mole-n=m/mr
    • Molar ratio
    • Molar ratio * moles
    • Mass required- m=n*Mr
  21. volumes
    • n=c*v
    • c=n/v
    • v=n/c

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