Curricular Competency Explanation

The purpose of the Acid-Base Titration Lab was to combine an unknown concentration with a known concentration to determine the concentration of the unknown solution. In context, the unknown solution that we had to find was hydrochloric acid (HCl) and the known solution was, sodium hydroxide (NaOH). To find the   unknown concentration, we utilize the titrations data to calculate the molarity of HCl. To determine the end point of the solution, an indicator is added causing to solution to change colour to a light tint of pink. The indicator used was phenolphthalein and when the pink colour remains for 30 seconds, the titrations is completed. Using our 3 best trials, our average volume of NaOH came out to be 14.79mL. Next, we found the moles of our average volume using the known molarity of 0.100M. After, we used a balanced equation to convert our NaOH moles to HCl, which resulted in 0.001479 moles of HCl. Lastly, we divide the volume (0.010L) to get a final concentration of 0.1479M of HCl.

Core Competency Reflection – Communicate

During this lab, I collaborated with a partner to achieve the result of the unknown solution. We both did our shares, taking turns initiating half drops and setting up our titrations. With trials and errors, my partner and I did a total of 3 trials including our rough trial. We communicated during each trials to get a better result on the next. On our practice trial, we tried to practice our half drops and that resulted in putting too much solution, that came out to be bright pink. Second practice trial, we had more knowledge on when to stop for the final volume. Finally, we started our real trial and this time we not over shoot and the solution turn into a light pink for 30 seconds. Together, we solved our own questions by reflecting on our errors from the past trials.