What volume (in milliliters) of phosphoric acid would you need to make the buffer? 0.338mL Previous Tries What mass (in grams) of KOH would you need to prepare 25.0mL of 1.00MKOH ? 1.63g Previous Tries What volume (in milliliters) of the 1.00MKOH would be needed to adjust the pH to 8.00 ? 9.32mL Previous Tries At pH 8.00 choose whether each species below is present to a significant degree. No: K3PO4 No: PO43 No: H3PO4 No: K2HPO4 Yes: H2PO4 Yes: HPO42 No: KH2PO4 Which of the following is the conjugate base? Incorrect K2HPO4 Incorrect PO43 Incorrect H2PO4 Correct: HPO42 At pH8.00, what is the concentration (in millimolar) of the conjugate base? Tries 1/5 Previous Tries 1pKa and pKa VALUES OF COMPOUNDS USED TO PREPARE BUFFERS * Concentrations probably about 0.1M What volume (in milliliters) of phosphoric acid would you need to make the buffer? 0.338mL Previous Tries What mass (in grams) of KOH would you need to prepare 25.0mL of 1.00MKOH ? 1.63g Previous Tries What volume (in milliliters) of the 1.00MKOH would be needed to adjust the pH to 8.00 ? 9.32mL Previous Tries At pH 8.00 choose whether each species below is present to a significant degree. No: K3PO4 No: PO43 No: H3PO4 No: K2HPO4 Yes: H2PO4 Yes: HPO42 No: KH2PO4 Which of the following is the conjugate base? Incorrect K2HPO4 Incorrect PO43 Incorrect H2PO4 Correct: HPO42 At pH8.00, what is the concentration (in millimolar) of the conjugate base? Tries 1/5 Previous Tries 1pKa and pKa VALUES OF COMPOUNDS USED TO PREPARE BUFFERS * Concentrations probably about 0.1M