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20 mL of 0.5 M NaCN solution is titrated with 0.4 M HCl solution. Calculate the...

  1. 20 mL of 0.5 M NaCN solution is titrated with 0.4 M HCl solution. Calculate the pH after the addition of:
  1. 10 mL HCl
  2.   25 mL HCl
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