Titration is a technique used to determine the concentration of an unknown substance by slowly adding a reagent which has a known concentration. In this lab we titrated a hydrochloric acid solution of undetermined concentration with standardized sodium hydroxide. The endpoint in a titration lab signifies when the concentrations of the titrate and the titrant are chemically equivalent. The end point in this titration lab was when the colour of our phenolphthalein indicator in the HCl changed from clear to light pink. The titration reached the endpoint at around 14.63 ml of NAOH left in the burette.

Core competency reflection

During this lab you and your partner had to communicate very well. Agreeing upon what our next course of action should be and whether or not more of the titrant should be added. Assigning jobs and making our roles clear was important to complete this lab as accurately as possible. I think that my lab partner and I had very good communication when it was time to execute and follow the steps. During the titration we communicated our findings so that we could be as precise as possible.