Question

please help asap and the values are from the procedure there is no additional info

QUESTION.

PROCEDURE 1. Obtain seven spectrophotometer tubes, three 5 mL pipets and seven 125 mL Erlenmeyer flasks. One for the blank and six sample test tubes. Make sure to label the test tubes with appropriated calculated concentration. Label one flask as NaSCN 2. Pipet 5 mL of 0.00020 M NaSCN into Erlenmeyer flask #1. Pipet 5 mL of 0.20 M Fe(NO3)3 into Erlenmeyer flask #1. Transfer 5 mL of this solution into test tube #1. This is your standard for the analysis. The concentration of Fes so large as to shift essentially all the SCN into the complex The remaining solutions wil be made by diluting the Fe allowing the reaction to shift to the left and be at equilibrium. Mix all the solutions thoroughly 3. (Flask #2) Place 10 mL of 0.20 M Fe(NO3)3 and add distilled water to bring the total volume to 25 mL into flask #2. In the flask labeled NaSCN, pipet 5 mL of 0.00020 M NaSCN. Pipet 5 mL of flask #2 solution into NaSCN flask. Mix thoroughly. Transfer 5 mL into test tube #2. Discard the remaining solution in the NaSCN Flask. 4. (Flask #3) Place 10 mL of flask #2, Fe(NO3)3 solution, into flask #3 and add distilled water to bring the total volume to 25 mL. In the flask labeled NaSCN, pipet 5 mL of 0.00020 M NaSCN. Pipet 5 mL of flask #3 solution into NaSCN flask. Mix thoroughly. Transfer 5 mL into test tube #3. Discard the remaining solution in the NaSCN Flask 5. (Flask #4) Place 10 mL of flask #3, Fe(NO3)3 solution, into flask #4 and add distilled water to bring the volume to 25 mL. In the flask labeled NaSCN, pipet 5 mL of 0.00020 M NaSCN. Pipet 5 mL of flask #4 solution into NaSCN flask. Mix thoroughly. Transfer 5 mL into test tube #4. Discard the remaining solution in the NaSCN Flask (Flask #5) Place 10 mL of flask 4, Fe(NO3)3 solution, into flask #5 and add distilled water to bring the volume to 25 mL. In the flask labeled NaSCN, pipet 5 mL of 0.00020 M NaSCN. Pipet 5 mL of flask #5 solution into NaSCN flask. Mix thoroughly. Transfer 5 mL into test tube #5. Discard the remaining solution in the NaSCN Flask. 6. 7. (Flask #6) Place 10 mL of flask 5, Fe(NO3)3 solution, into flask #6 and add distilled water to bring the volume to 25 mL In the flask labeled NaSCN, pipet 5 mL of 0.00020 M NaSCN. Pipet 5 mL of flask #6 solution into NaSCN flask. Mix thoroughly. Transfer 5 mL into test tube #6. Discard the remaining solution in the NaSCN Flask. Calculate the initial concentration of [Fe3 ] in each solution and the initial concentration of [SCN] Place the concentrations into the data table below. Attach your work to the lab. Tube Number 1 (standard) 4 SCN].

Answer 1

: 239 92) 4 47 2s wa Fr Raak-3 : 6632 (M 25 mA 10x0. 032 : 25X5( aaks 40 X2)0512 ) Floak-6 10mL×0.ro 5 12(M) /X. dr、 0 00aoue (m) Tukz Nambu Fe 0 20 (M) 0 08 (M b o12 () O2045 ()