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Understanding Acids and Alkalis in Chemistry

Learn about properties and effects of acids and alkalis, pH ranges, common examples, dilution effects, and ion concentrations in solutions.

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Understanding Acids and Alkalis in Chemistry

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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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