these are the steps for part b Part B. Separating and Identifying the Groups B: Fe3+ and Al3+ Ions Caution: 6M NH3 solution is a corrosive, toxic substance. Prevent eye, skin, and clothing contact. Ammonia fumes can cause permanent fogging of soft contact lenses. Avoid inhaling the vapors. 1. Record all observations on Data Sheet 1. 2. Neutralize the supernatant liquid containing Fe3+, Al3+, Cu2+ ions, saved from Part A, with the dropwise addition of 6M NH3 solution. At this point, the Fe3+ and Al3+ ions are presented in the supernatant liquid as yellow [FeCl4]- ions and [Al(H2O)6]3+ ions, respectively. Count the number of drops of NH3 solution needed to neutralize (pH = 7) the liquid and record. Thoroughly stir the solution after adding each drop of NH3. Chemistry 202 College of the Canyons Spring 2025 Page | 185 3. Create a buffer solution (pH 9-10) by adding as many additional drops of 6M NH3 as were needed to neutralize in Step 2, Part B. 4. Centrifuge the test tube and its contents for 2 min. Decant the supernatant liquid containing Cu2+, ions into a clean test tube. Label the test tube "Cu2+ Ion." Set the labeled test tube aside for use in Part C. 5. Rinse the precipitate, which is a mixture of (FeOH)3 and Al(OH)3, two times, using 10 drops of distilled water each time. Centrifuge the mixture, and discard the rinses into the container provided by your laboratory instructor and labeled "Discarded Rinses and Supernatants." 6. Add 6 drops of 6M NaOH solution to the Fe(OH)3