AL Chemistry Experiment Report Sheet

Experiment 15: The pH of Acids

 

Name: ___________________ (       )                                           Form 6 S

 

Part I: The pH of a weak acid at various concentrations

 

1.   Compare the pH of ethanoic acid with hydrochloric acid at each concentration.

      (a)  In which of the two acids is the concentration of hydrogen ions greater?

 

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(b)      What does this tell you about the extent of dissociation of ethanoic acid compared to hydrochloric acid?

 

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2.   What happens to the difference between the pH of the two acids as concentration decreases? What does this tell you about the effect of dilution on dissociation?

 

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Part II: The pH of different acids at the same concentration

 

      List these acids in order of decreasing acid strength.

     

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The End