Tag : colorimeter

Rate Law Determination of a Crystal Violet Reaction

Objective: To determine the reaction order with respect to crystal violet and determine the rate constant and half life for the reaction: [CV+ + OH– Þ CVOH]. Procedure: (1) Calibrate the Colorimeter with distilled water. (2) Prepare a solution with 10ml each of the provided CV and OH. (3) Let solution stand for 3 minutes before beginning (4). (4) Place solution in Colorimeter and record data point with software. (5) Remove solution for one minute. (6) Repeat steps (4-5) twenty […]

Determining Equilibrium Constant for Thiocyanatoiron

Objective Determine the equilibrium constant Kc for the chemical reaction: Fe3+(aq) + SCN–(aq) ß à FeSCN2+(aq) Procedure 0.0020M Fe(NO3)3 (ml) 0.0020M KSCN (ml) H2O (ml) 5 2 3 5 3 2 5 4 1 5 5 0 18 (0.2M) 2 0 (1)  Calibrate the colorimeter. (2)  Prepare five test tubes with the designated solutions: (3)  Measure each solution using the colorimeter and computer software. (4)  Record an observation of the solution temperature. (5)  Calculate the average equilibrium constant for the […]