Reactions in aqeous solutions

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Grade 10 Physical Sciences …

Grade 10 Physical Sciences

Based on Andries Oliviers' CAPS aligned textbook

Focus area: Reactions in aqueous solutions

More in: Education
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  • 1. Reactions inaqeous solutions
  • 2. Water
  • 3. Water is polar + - δ δ
  • 4. Forms adipole
  • 5. Water is an excellentsolvent
  • 6. Compounds that contain polar molecules Ionic solids
  • 7. Polar molecules ionisation: + - HCl(g) → H (aq) + Cl (aq) δ+ δ-
  • 8. Ionic solids dissociation: + - NaCl(g) → Na (aq) + Cl (aq)
  • 9. Solutions that conductelectricity are known aselectrolytes
  • 10. Strong Weak Non- electrolytes
  • 11. Strong Weak Non- High Low No [ions] [ions] [ions] Do notConduct Conduct Conduct well poorly
  • 12. Conductivity depends on: Type of substance Solubility of substanceConcentration of the ions in solution
  • 13. Types of chemical reactions
  • 14. Ion exchange reactions
  • 15. Includes:Precipitation reactionsGas forming reactionsAcid-base reactions
  • 16. Precipitationreactions
  • 17. Precipitate forms when there is acombination of ions that can form a salt that is insoluble in water.
  • 18. Solubility rules
  • 19. Balanced chemical equations for precipitate reactions Formulae Chemical of equation Word Balance reactants forequation & precipitate products
  • 20. Testing for certain ions
  • 21. Testing forhalides
  • 22. - - -Cl , Br , I
  • 23. AgNO3 (aq) and shake -Cl White precipitate Nitric acid Nothing happens: chloride
  • 24. AgNO3 (aq) and shake -Br Cream coloured precipitate Nitric acid Nothing happenes bromide
  • 25. AgNO3 (aq) and shake-I Yellow precipitate Nitric acid Nothing happens iodide
  • 26. Testing forSulphates
  • 27. BaNO3 (aq) White precipitate Nitric acidNothing happens: sulphate
  • 28. Testing forcarbonates
  • 29. BaNO3 (aq) White precipitate Nitric acidPrecipitate disappears: carbonate
  • 30. Gasformingreaction
  • 31. When ions exchange, and a gas is part of the product. Acid and carbonate → CO2 Acid and metal → H2
  • 32. Acid-base reaction
  • 33. Acid-baseneutralisation
  • 34. Acid and metal oxide
  • 35. Acid and a metal carbonate
  • 36. Acid and a metal
  • 37. Redox reactions
  • 38. Reduction/oxidation reaction
  • 39. Loss of electrons - oxidation
  • 40. Gain of electrons - reduction
  • 41. Metal displacementHydrogen displacementHalogen displacement
  • 42. Tosummarise
  • 43. When substances mix with water,they can dissolve.
  • 44. When these solutions conductelectricity, they are called electrolytes.
  • 45. Ion exchangereactions: Cations and anions in solutions swop around.
  • 46. Precipitation reactions:One of the products are insoluble.
  • 47. Gas forming reactions:One of the products is a gas.
  • 48. Acid-base reactions:Acids react to metal- ormetal-based substances to form H2