32. Which of the following is true about Liebig method tor determination if tyaritier a. A red complex a b. The tiration process requires an indicator to signal the end of titration) c. The ratio of silver to cyanide is 2:1 with a permanent taint turbidity as the mervelesirt. d. The addition of excess amount of AgNO3 produces an insoluble compound matrices present in the sample? purity of the sample. a. 90 b. 85 c. 95 d. 80 37. An adsorption indicator works on the following principle: a. The charge on the surface of a colloidal particle changes, attracting the indicator to the surface of the particle producing a change in color. b. All of the above c. The removal of the analyte allows the reaction of an ion previously added to the analyte to form a soluble colored complex d. The change in pH of the solution causes the indicator to shift from the acid form to the conjugate base or the base form to the conjugate acid producing a change in color. 38. Caloulate the molar concentration of a solution that is 30% ow NH4NO3 and has a specilic gravity of 112521 a. 6.85M b. 3.08M c. 4.22M d. 5.27M 39. Which of the foliowing aqueous solutions of the same concentration will have the largest pH value at 25C ? a. NH3 b. NaF c. KCl d. NH4Cl 40. A 7.279-gram sample of meat was analyzed for its nitrogen content using Kyeldabl Method Upon digestion, 1I amimonia liberated was collected in 250mL of 0.855MH3BO. The resulting solution was titrated with 17 t mL of 0.3122MHO using mixed indicator. Determine the \% protein in the sample using 6 : 5 as actor hor m products. a. 3.14% b. 2.24% c. 19.69% d. 1309% turbidity. Express the resuit of this analysis as \% CN1 2. 1534 b. 17.25 c. 23.01 d. 3067