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Carbon dioxide

Carbon dioxide

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Carbon dioxide

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  1. Carbon dioxide

  2. RAG Sheet & WordBank • Red Amber Green (No idea) (Some clue) (Know it)

  3. What do you know about CO2? • < 1% of air is CO2 • Plants used CO2 for photosynthesis • Without photosynthesis, no food for animals and for humans

  4. Preparation of Carbon dioxide • In reactions of air and oxygen: • Very expensive way to manufacture CO2

  5. Preparation of Carbon dioxide (MP) • Reaction between dilute hydrochloric acid and marble chips • Marble chips = calcium carbonate = CaCO3 • Word equation: Calcium Carbonate + hydrochloric acid  Calcium chloride + water + carbon dioxide Formula equation (HL): CaCO3 + HCl CaCl2 + H2O + CO2 • CO2 collected by the upward displacement of air

  6. Preparation of Carbon dioxide (MP) • Main steps: • Dilute HCl is dropped onto marble chips, enough to keep chips fizzing • Jars of gas collected

  7. Practical worksheet

  8. Properties of Carbon dioxide (MP) • Colourless, odourless, tasteless gas • Limewater (calcium hydroxide) turns milky

  9. Properties of Carbon dioxide (MP) • Colourless, odourless, tasteless gas • Limewater (calcium hydroxide) turns milky • Word equation: Calcium Hydroxide + carbon dioxide  chalk + water • Formula equation (HL) Ca(OH)2 + CO2 CaCO3 + H20 • Carbon dioxide + water turns blue litmus paper red  • acidic gas (carbonic acid) • Carbon dioxide quenches a burning split • Denser then air

  10. Properties of CO2 - Summary

  11. Practical worksheet

  12. Uses of CO2 • Fizzy drinks • CO2 under pressure provides fizz when opened • Fire Extinguishers • Ideal as more dense then air and does not support combustion • Refrigeration • Dry ice, CO2 gas under pressure turns into white solid. • Sublimes – used in transportation of food • Special effects in concerts

  13. RAG Sheet & WordBank • Red Amber Green (No idea) (Some clue) (Know it)

  14. Worksheet • Exam questions • Mind maps