Make sure that on your data table appears the correct number of significant figures! Solution Blank (diH2O) Absorbance y 0 Concentration (grams/mL) X 0 0.3708 0.185 Stock Diluted Solution #1 0.595 A 0.303A 0.150 A 0.074 Diluted Solution #2 Diluted Solution #3 Unknown 0.093 0.047 To be determined using Calibration Graph 0.68A Plot 2 Calibration Graphs 1) Use graph paper (on page 26) to create a calibration graph by hand. (Instructions are on page 27.) 2) Use MS Excel or the Graphical Analysis program. (Instructions start on page 29). Attach this graph to the back of your lab report. For each calibration graph, ✓ Plot Absorbance vs. Concentration (g/ml) using the five data points: (Blank, Stock, Solutions 1, 2, and 3) Absorbance is on y-axis and Concentration (g/mL) is on X-axis. Label each axis on the graph. Include where appropriate. ✓ Write a title above the graph. Example: "Absorbance vs. Concentration (g/mL) of_ " name the compound that was used in the experiment). Draw the "best fit" line. Do NOT connect the dots!!!