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Chemical reactions: Acids/Alkalis and Acids/Carbonate

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The chemical reactions that happen between acids/alkalis and acids/carbonates for the high school science class

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Chemical reactions: Acids/Alkalis and Acids/Carbonate

  1. 1. Jacques Zeefenbergen © 2012
  2. 2. Remember: What is pH of an ALKALI?Alkalis have a pH value greater than 7 0 7 14 ALKALI Jacques Zeefenbergen © 2012
  3. 3. Characteristics of ALKALI? Alkalis is a base that is soluble in water (can dissolve)Strong alkali can cause chemical burnsAlkali feels slippery or like soap when you touch it. Jacques Zeefenbergen © 2012
  4. 4. FORMULA of an ALKALI? Metals from group I and II I – Alkali metals II – Alkali earth metalMost alkalis are hydroxide compounds (I or II)OH (aq) Jacques Zeefenbergen © 2012
  5. 5. Remember: What is pH of an ACID?Acids have a pH value less than 7 0 7 14 ACIDS Jacques Zeefenbergen © 2012
  6. 6. Characteristics of ACID? ACIDS can react with a base Acids have a sour tasteAcids contain hydrogen and an oxide Jacques Zeefenbergen © 2012
  7. 7. FORMULA of an ACID? Metal oxide H+ Non-metal oxide Chloride gasMost acids are hydrogen compounds H(O-compound) (aq) Jacques Zeefenbergen © 2012
  8. 8. What reaction will take place? NEUTRALISATIONWhen ACID is added to ALKALI, they will cancel one another out.The reaction is called neutralisation,because they neutralise one another. Jacques Zeefenbergen © 2012
  9. 9. All neutralisation reactions follow the same form: Alkali + Acid  salt + water (metal)OH + H(O compound)  (metal)(O compound) + (H)(OH) Jacques Zeefenbergen © 2012
  10. 10. Jacques Zeefenbergen © 2012
  11. 11. What is a CARBONATE? (metal) + CO3 (s) Examples: CaCO3 (s) MgCO3 (s) CuCO3 (s) Jacques Zeefenbergen © 2012
  12. 12. What is an ACID?Hydrogen + (chloride OR sulphate OR nitrate) Examples: HCl (aq) or (l) H2SO4 (aq) or (l) HNO3 (aq) or (l) Jacques Zeefenbergen © 2012
  13. 13. ALL reactions between carbonates and acid has the same form. Carbonate + acid  salt + water + carbon dioxide Jacques Zeefenbergen © 2012
  14. 14. Steps: 1) Metal replaces “H” to form a salt MgSO4 (s) + H 2) Carbonate decomposes CO3  CO2 (g) + O3) Extra “H” and “O” combines to form water 2H + O  H2O(l) Jacques Zeefenbergen © 2012
  15. 15. Calcium carbonate + hydrochloric acid  Jacques Zeefenbergen © 2012
  16. 16. Magnesium carbonate + sulphuric acid  Jacques Zeefenbergen © 2012
  17. 17. Copper carbonate + nitric acid Jacques Zeefenbergen © 2012

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