Acids and Bases Key Definitions and Theory

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1. The pH scale is logarithmic, this means

  • The difference between each successive whole number pH value is a factor of 10
  • Small [H+(aq)]
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2. A high value of Ka matches a _______ value of pKa

  • Low
  • High

3. Values of Ka can be made more manageable by expressing them

  • In a logarithmic form known as pKa
  • A small extent of dissociation therefore the acid is weak

4. The reaction with hydrochloric acid and calcium carbonate has an ionic equation this is:

  • 2H+(aq) + CaCO3(s) ----> Ca2+(aq) + CO2(g) + H2O(l)
  • Salt carbon dioxide and water

5. What is the ionic equation for the reaction between nitric acid an magnesium oxide

  • 2H+(aq) + MgO(s) ---> Mg2+(aq) + H2O(l)
  • Salt carbon dioxide and water


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