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Acids and Alkalis

8. 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. 8 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 ey/mmcl2003

  2. 1 answer Which type of oxide dissolves in water to produce acids? Non-metal oxides ey/mmcl2003

  3. 2 answer What is formed when sulphurdioxide reacts withwater in the atmosphere? Acid rain ey/mmcl2003

  4. 3 answer Which type of oxide dissolves in water to produce alkaline solutions? Metal oxides ey/mmcl2003

  5. 4 answer Give an example of the damagingeffects ofacid rain Destroys wildlife, damages buildings/metal structures ey/mmcl2003

  6. answer 5 Which one of the following will produce an acidicsolution when dissolved in water ? NO2 Na2O FeO ey/mmcl2003

  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 ey/mmcl2003

  8. 7 answer Which of the following will produce an alkaline solution when dissolved in water ? NO2 Na2O FeO ey/mmcl2003

  9. 8 answer What is the range of pH valuesfor anacid? Less than 7 ey/mmcl2003

  10. 9 answer Universal indicator was added to asolution and it turned RED. What type of solutionis it ? acidic ey/mmcl2003

  11. 10 answer What is the pH range for anALKALI? Greater than 7 ey/mmcl2003

  12. 11 answer Universal indicator was added to asolution and it turnedblue. What type of solution is it? Alkaline ey/mmcl2003

  13. 12 answer What is the pH number for a neutral substance? 7 ey/mmcl2003

  14. 13 answer Whichionis common to all acids? H+ ey/mmcl2003

  15. 14 answer Universal indicator was added to asolution and it turnedgreen. What type of solution is it? neutral ey/mmcl2003

  16. 15 answer Whichionis common to all alkalis? OH- (hydroxide ion) ey/mmcl2003

  17. 16 answer During electrolysis of an acid hydrogen gas is given off.What is the test forHYDROGENgas? Burns with a pop! ey/mmcl2003

  18. 17 answer Give an example of a common acid vinegar, fizzy drinks ey/mmcl2003

  19. 18 answer Give an example of a common alkali. Toothpaste, bicarbonate of soda ey/mmcl2003

  20. 19 answer What happens to thepHof an acid when diluted with water? Itincreases to 7 ey/mmcl2003

  21. 20 answer What happens to the pH of an ALKALI when diluted with water ? Itdecreasesto7 ey/mmcl2003

  22. 21 answer What happens to the acidity of an acid when dilutedwith water ? The acidity decreases (less acidic) ey/mmcl2003

  23. 22 answer What happens to thealkalinityof an alkali when diluted with water? It decreases -becomes less alkaline ey/mmcl2003

  24. 23 answer What happens to theconcentration of H+ions in an acid when diluted with water? The concentration decreases ey/mmcl2003

  25. 24 answer What happens to theconcentration of OH-ions in an alkali when diluted with water ? The concentrationdecreases ey/mmcl2003

  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 ey/mmcl2003

  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? ey/mmcl2003

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