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Part A Calculate the pH after 2.575 mL of HCl have been added. Enter the pH to two decimal places. Part B Calculate the pH

Part A

Calculate the pH after 2.575 mL of HCl have been added.

Enter the pH to two decimal places.

Part B

Calculate the pH when 12.875 mL of HCl has been added.

Enter the pH to two decimal places.

Piperazine, HN(C4H8 )NH, is a diprotic weak base used as a corrosion inhibitor and an insecticide and has the following properties: = 4.22 pKb2 = 8.67 For writing the reactions of this base in water, it can be helpful to abbreviate the formula as Pip: Pip + HO = PipH+ + HO = PipH+ + OH- 2+ PipH PipH+ + OH- The piperazine used commercially is a hexahydrate with the formula C4H10N2.6HO.

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