- Pea Follow The Instructor S Directions For Proper Disposal Of Part 1 Amphoteric Species Amphoteric Species Are Able To 1 (38.84 KiB) Viewed 22 times
PEA Follow the instructor's directions for proper disposal of Part 1. Amphoteric species Amphoteric species are able to act as both an acid and a base. For solutions 1-3, each compound breaks into ions, one of which can donate and accept a hydrogen ion. Soln #1 Soln #2 Soln #3 0.10 M NaHSO 0.10 M NGHCOS 0.10 M Na HPO Before making any measurements, calibrate your pH meter using the standard solutions provided. Be sure to transfer the standard solution into a clean dry flask to carry out the calibration. Procedure 1. Pour -20mL of solution into a small beaker. 2. Measure the pH of each solution. Analysis 1. Identify the major species.present. 2. Based on the measured pH, identify the solution as a strong/weak acid/base. 3. Use equilibrium constants in the table below to identify/calculate the K, and K. of each amphoteric species. Based on the values, are the measured pH values consistent with the theoretical values of K, and K,? Substance K₂₁ Strong acid H₂SO 4.3 x 10 H₂CO H₂PO 7.5 x 10¹ 750ln #1 PH = 1.56 Soln #2 |PH=9.57 Soln #3 PH=8.38 46 Kaz 0.012 5.6 x 10 6.2 x 10 Kas N/A N/A 4.2x 10-13