When performing a titration procedure, if the color keeps changing back and forth between the initial and final colors are the reagents bad?
The color change won't stabilize in a titration
During a titration procedure, the color may vacillate between the initial and final colors as the end point draws close. The operator should wait for the color to stabilize (approximately 15 seconds). If the color stabilizes on the final color, then the titration is complete; if the color stabilizes on the initial color the operator should continue adding titrant.