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.

Transcribed Image Text:

Piperazine, HN(C4H8 )NH, is a diprotic weak base used as a corrosion inhibitor and an insecticide and has the following properties: ркы = 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 + H₂O = PipH+ + H₂O = PipH+ + OH- 2+ PipH₂ PipH₂²+ + OH- The piperazine used commercially is a hexahydrate with the formula C4H10N2.6H₂O. Piperazine, HN(C4H8 )NH, is a diprotic weak base used as a corrosion inhibitor and an insecticide and has the following properties: ркы = 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 + H₂O = PipH+ + H₂O = PipH+ + OH- 2+ PipH₂ PipH₂²+ + OH- The piperazine used commercially is a hexahydrate with the formula C4H10N2.6H₂O.