4. The total carbon dioxide content (HCO3 + CO2) in a blood sample is determined by acidifying a sample and measuring the volume of CO2 evolved with a Van Slyke manometric apparatus. The total concentration was determined to be 28.5 mmol/L. The pH at 37 °C was determined to be 7.48. What are the concentrations of HCO3 and CO2 in the blood? HINT: pKa =6.10 (10 points) [HCO3] = [CO2] =