Hi,

Im trying to calculate the pH of my solution once I add a certain amount of base to it.

My acid is: 25mL .10190 M HCl + 50mL H2O

My base is: .1751 M NaOh

I need to calculate the pH after I add 7 mL of NaOH to the HCl solution, after 13.4 mL of NaOH is added, after 14.4 mL NaOH is added, and after 21.4 mL NaOH is added.

I did this calculation for after 7 mL NaOH is added.

https://imgur.com/a/436qdlR My result came close to the pH observed actually in lab.

When I tried the same process with 13.4 mL NaOH added, I got a -log value of .44.

I dont know what to do

Any help is appreciated. Thank you.