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Acids and Alkalis

7. Acids and Alkalis. 1. 2. 3. 4. 5. 6. 7. 9. 8. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 1. answer. Which type of oxide dissolves in water to produce acids?. Non-metal oxides. 2. answer.

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Acids and Alkalis

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  1. 7 Acids and Alkalis 1 2 3 4 5 6 7 9 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Calderglen High School

  2. 1 answer Which type of oxide dissolves in water to produce acids? Non-metal oxides Calderglen High School

  3. 2 answer What is formed when sulphurdioxide reacts withwater in the atmosphere? Acid rain Calderglen High School

  4. 3 answer Which type of oxide dissolves in water to produce alkaline solutions? Soluble Metal oxides Calderglen High School

  5. 4 answer Give an example of the damagingeffects ofacid rain Destroys wildlife, damages buildings/metal structures Calderglen High School

  6. answer 5 Which one of the following will produce an acidicsolution when dissolved in water ? NO2 Na2O Non metal oxides dissolve in water to form ACIDS FeO Calderglen High School

  7. answer 6 How would you use universal indicator or pH paper to find the pH of a substance ? Add indicator/pH paper to the substance and the check colour Calderglen High School

  8. 7 answer Which of the following will produce an alkaline solution when dissolved in water ? NO2 Na2O Soluble metal oxides dissolve to form alkalis FeO Calderglen High School

  9. 8 answer What is the range of pH valuesfor anacid? Less than 7 Calderglen High School

  10. 9 answer Universal indicator was added to asolution and it turned RED. What type of solutionis it ? acidic Calderglen High School

  11. 10 answer What is the pH range for anALKALI? Greater than 7 Calderglen High School

  12. 11 answer Universal indicator was added to asolution and it turnedblue. What type of solution is it? Alkaline Calderglen High School

  13. 12 answer What is the pH number for a neutral substance? 7 Calderglen High School

  14. 13 answer Whichionis common to all acids? H+ Calderglen High School

  15. 14 answer Universal indicator was added to asolution and it turnedgreen. What type of solution is it? neutral Calderglen High School

  16. 15 answer Whichionis common to all alkalis? OH- (hydroxide ion) Calderglen High School

  17. 16 answer During electrolysis of an acid hydrogen gas is given off.What is the test forHYDROGENgas? Burns with a pop! Calderglen High School

  18. 17 answer Give an example of a common acid vinegar, fizzy drinks Calderglen High School

  19. 18 answer Give an example of a common alkali. Toothpaste, bicarbonate of soda Calderglen High School

  20. 19 answer What is pH? A measurement of the concentration of hydrogen ions (H+) in a substance. Calderglen High School

  21. 20 answer Give two main sources of carbon dioxide production. • Burning organic substances • Cement production Calderglen High School

  22. 21 answer What is a Carbon Footprint? The total greenhouse gas emission caused by a person or process Calderglen High School

  23. 22 answer List some ways that excess carbon dioxide production may harm the environment? • Global Warming • Acidification of Oceans Calderglen High School

  24. 23 answer List some uses of acids in food and drinks • Vinegar • Preservatives • Flavourings Calderglen High School

  25. 24 answer How can acids in food and drink affect your health? Tooth decay Calderglen High School

  26. 25 answer Calculate the concentrationof a solution containing 0.5 moles of solute dissolved in 500 cm3 of water. C = M/V 0.5/0.5 = 1 moles per litre Calderglen High School

  27. 26 answer • Moles = CxV 0.2 x 0.5 = 0.1 mole • 1 mole of NaOH 23 + 16 +1 = 40 • 0.1 moles = 0.1 x40 = 4g Calculate themass of NaOH required to make 500cm3 of a 0.2 mol/l solution of sodium hydroxide? Calderglen High School

  28. 27 answer In water, how are the concentrations of hydrogen ions and hydroxide ions related? They are equal Calderglen High School

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