Critical Thinking and Collaboration
A titration is a technique used to find the unknown concentration of a solution by using another solution of a known concentration. In this experiment, we used a base of 0.1M to determine the molarity of hydrochloric acid. The endpoint of a titration is when the colour of the solution indicates that it is neutralized. For example, by adding phenolphthalein, it showed the end point of the titration by turning the solution a translucent, pale pink, as shown in the image above. To know that you have reached the endpoint, this pale colour will remain for about 30 seconds, then disappear again. Our results showed that (on average) 13.37 mL of NaOH was adequate to neutralize 10.00mL of HCl. It was at that point when we reached the lightest possible pink through all of our trial and error, showcased in image above. With this information, we determined the molarity of the hydrochloric acid to be 1M (unrounded number: 1.337M). [HCL]=1M.
Thinking Core Competency Reflection
“I use evidence to make judgements or decisions as demonstrated in this…”
“I can give, receive and act on feedback to progress in my goals.”
During the titrations lab, I persevered through the procedure when met with failure, reflected on my learning, and developed my critical thinking. I used my judgment to make decisions regarding accuracy in the lab, that being reading and recording measurements. I acted on feedback when given to further improve my understanding and growth, taking it as a learning opportunity. For example, when told to remeasure something (like acid in the pipet) or be more precise (when distributing drops of base into acid from the burette) I did my very best in order to showcase my adaptability, personal growth, and accuracy to the experiment. This contributed to my success, as there were several failures when too much base was added and I had to restart the procedure. This is proof of my advancement in the lab. Overall, this lab was a mentally stimulating challenge which I took constantly seeking to improve and with a willingness to do better.
Collaboration Core Competency Reflection
“I can apply constructive strategies to navigate misunderstandings and conflicts.”
“I can take on roles and responsibilities in a group; I do my share.”
Collaboration and leadership are important elements to any partner work or group’s success. My partner was absent for two of the three days, so I taught her the necessary steps in order to complete the experiment(s). For example, I showcased precision in multiple ways. When it came to measuring by using the pipet, I showed my partner how to to do it by giving a demonstration and then suggesting ways to improve so we could gain more accurate results. As for the burette, I displayed how to create drops and half-drops in order for us to err on the side of caution when experimenting with the base to acid ratio. If any misunderstandings were had, or any clarification was needed, I supplied a helpful answer, showing leadership by sharing knowledge and understanding, and in turn, developing our collective growth.