Part A
As a technician in a large pharmaceutical research firm, youneed to produce 150. mL of a potassium dihydrogen phosphate buffersolution of pH = 7.00. The pKa of H2PO4− is 7.21. You have thefollowing supplies: 2.00 L of 1.00 M KH2PO4 stock solution, 1.50 Lof 1.00 M K2HPO4 stock solution, and a carboy of pure distilledH2O. How much 1.00 M KH2PO4 will you need to make this solution?(Assume additive volumes.) Express your answer to three significantdigits with the appropriate units.
Part B
If the normal physiological concentration of HCO3− is 24mM, what is the pH of blood if PCO2 drops to 24.0mmHg ?
Express your answer numerically using two decimal places.
