1. Using the second-derivative values for the point before and the point after the equivalence point, determine the equation of the line that passes through the equivalence point. Show your work in your notebook. 2. Using the equation of the line you determined, calculate the exact volume of added titrant at the equivalence point. Show your work in your notebook. 3. Determine the concentration of ferrous ammonium sulfate in solution. Show your calculation in your lab notebook.