H3CA is a vitally important intermediate in the metabolism of carbohydrates. The compound is widely distributed in plant and animal tissues and fluids. H3CA is a triprotic acid, i.e., it requires three moles of NaOH to fully neutralize one mole of H3CA. a) If it requires 21.35 mL of 0.678 M NaOH(aq) to fully neutralize 0.927 g of H3CA, what is the molar mass of H3CA? Show your work below (and on the back, if needed).b) Given the following % composition, determine the true formula of H3CA: 37.51% C; 4.20% H; 58.29% O.

16. Every year, oral rehydration therapy (ORT) –the feeding of an electrolyte solution -saves the lives of countless children worldwide who become severely dehydrated as a result of diarrhea. One requirement of the solution used is that it be isotonic with human blood. An ORT solution contains 3.5 g NaCl, 1.5 g KCI, 2.9 g Na3C6H507 (sodium citrate), and 20.0 g C6H1206 (glucose) per liter. What is the freezing point of this solution? You may assume that the density of the solution is 1.00 g/mL and that the freezing point depression constant (Kf) for water is 1.86 °C/m. -0.59 оС -1.86 оС 0.00 oC +0.51 oC -7.44 oC