During this lab, the purpose was to titrate the HCl solution with an unknown concentration of NaOH solution. A titration is a method used to determine the unknown concentration of a solution by adding a solution with a known concentration into it to trigger a reaction and establish or calculate the concentration of the solution.The titration used in this specific lab was to calculate the unknown concentration of hydrochloric acid using a known concentration of sodium hydroxide. The endpoint of a titration is observed when the colour of the solution changes depending on the indicator used. During this lab, the indicator used was phenolphthalein therefore the endpoint of the titration would be when the solution become a shade of very light pink. In order to confirm that an endpoint of a titration has been reached the solution must remain the shade of pink for a minimum of about 30 seconds for the titration to be considered complete. In our lab the results for the concentration of hydrochloric acid was 0.1487M. To calculate our concentration we used the average volume of NaOH used (14.87mL), converted it to litres, calculated the moles of NaOH and used that number to find the moles of HCl and then divided that by litres of HCl to determine the molarity/concentration of the solution.
Initial Volume Reading= 0.14 ± 0.01mL
Final Volume Reading= 14.96 ± 0.01mL
Throughout the time that this lab was completed, communication was a large part in the success of it. Being able to work alongside and discuss what steps must be taken in order for this lab to work is really important and my partner and I were able to work together in order to help each other complete the lab to the best of our abilities. We communicated by doing things like reading out the amount left in the buret in order for us to have an estimate of how much more NaOH needed to be added and not move too fast. My partner and I also divided the roles amongst us in order to be efficient and work together to ensure the results come out as successful as possible. Lastly my partner and I were also able to communicate with our teacher if we ever needed guidance or assistance of w were ever unsure about something regarding the lab, resulting in a successful titration lab.
