Titrations (Lab 20C) Reflection

Artifact – Titration Lab Video

Curricular Competency Explanation

A titration is a technique used to determine the concentration (or molarity) of an unknown substance. In this lab, we were to perform a acid-base titration, neutralizing hydrochloric acid (HCl) and sodium hydroxide (NaOH) forming a neutral water compound. During our procedure, we added two drops of phenolphthalein to the hydrochloric acid which allowed us to physically see the end of the titration; when a constant light pink colour was achieved. This is called an equivalence point/endpoint, where the number of moles of acid are equivalent to the number of moles of base. Utilizing the titration data, we were able to calculate and conclude that the hydrochloric acid solution had a concentration of 0.145 M.

Core Competency Reflection

Communication/Collaboration:

I worked collaboratively with a peer during this lab to complete the procedure. We assigned roles to effectively use the time given. I was assigned to read the procedure and perform the titration, releasing the sodium hydroxide into the hydrochloric acid. My partner had obtained all the equipment, and rinsed the burette and pipette, while I set up the equipment.

My partner and I had double checked the readings with one another to ensure that the data recorded was accurate. To solve misunderstandings with each other regarding the procedure, we asked other peers at our lab table to come to a conclusion.

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