Question

5. In this experiment, you will prepare a standard solution for a calibration curve for the formation of FeSCN2 complex by reaction different volumes of 0.2 M Fe(NO,), and 0.002 M NaSCN. You will use 0.05M HNO, for all dilutions. Using the table, Calculate the equilibrium concentrations of FeSCN2 Vol of Fe Vol of SCN 0.1 M HNO Equilibrium concentration Fe[SCN]2' (mL) (mL.) (mL) 10.00 0.00 10.00 10.00 1.00 9.00 10.00 2.00 8.00 10.00 3.00 7.00 10.00 4.00 6.00 10.00 5.00 5.00 18 Experiment 11 Le Chatelier's Principle: Chemical Equilibrium and Determination of Equilibrium Constant: Pre-Lab

Answer 1

5) Here more and of Fet used ne more concentration of Pet3 and more volume used. very less moles of sew used se less concentration (0.002m) and less volume used so we can assume that the reaction is complete as very very excess males of Fret3 used. so SCD acts as imiting reactant. [scn) hittad in a Crescath] equillbrium. mixture (Felsche] 2 [sco), mmoles of ser Jotal volume o & = 2 20 mL Total volume all solutions cre+3+ 55+ HNO Cresent?) 2 0-Oozm x 1-oomL z o.ooolm 20.ooml Crescat) Crescht?) [sow) 0.002mx 2.00m 20.0002m. (scanmar - 20.00m Cresenta z 0:002mx 3-00ml z 0.0003 m 20-00mL 0.0004m. [rescatza 2 0.002m x 400ml 20-00mL (Fresentzea 2 0.002m x 500mL a 0.0005m. 20-00ML