CHEMISTRY 108 Lab Exam 3 Study Guide.

CHEMISTRY 108 Lab Exam 3 Study Guide. Lab exam 3 Exam Page 1 Answer the following two questions Why was the paper chromatogram sprayed with ninhydrin solution in the chromatogram experiment? It causes the amino acids to react and change color so we could read the analysis of the experiment. Why was no peak for Hydrogen present in the SEM spectrum for aspirin (C9H8O9)? H is no able to be detected by the SEM. Answer Key Answer the following two questions Why was the paper chromatogram sprayed with ninhydrin solution in the chromatogram experiment? The paper chromatogram was sprayed with ninhydrin solution to make the amino acids visible. Why was no peak for Hydrogen present in the SEM spectrum for aspirin (C9H8O9)? No peak for Hydrogen was present in the SEM spectrum for aspirin (C9H8O9) because H cannot be detected by SEM. Exam Page 2 A 1.1000 gram carbonate sample chosen from Li2CO3, K2CO3, Na2CO3 and CaCO3 was reacted with H2SO4 and was found to lose 0.3497 gram of CO2. (1) Show the calculation of the % CO2 in the unknown carbonate sample. (2) Show the calculation of the % CO2 in each of the carbonate compounds and identify the unknown carbonate from the list.