Hello, I\'m working on a Titration of strong and weak acids chemistry lab. I\'ve

Question

Hello,

I'm working on a Titration of strong and weak acids chemistry lab. I've completed the experiments and graphed my data. I'm struggling to find the equivalence point on the graph. During the experiment the solution changed color when 28.01 ML of NAOH was added to the solution of HCL(volume 53.12) and the pH rose to 9.97. Is this considered to be the equivalence point? I'm also struggling to answer question 3. Thank you.

3. a. At the equivalence point, how many moles of 1 M NaOH were added to the flask. To get the number of moles, multiply the molarity by the number of LITERS of NaOH added.

Explanation / Answer

Given molarity of NaOH is M = 1M

also volume of NaOH added is , V = 28.01 mL

                                                  = 28.01x10-3 L         since 1 mL = 10-3 L

We know that Molarity , M = number of moles /volume in L

So number of moles of NaOH , n = Molarity x volume in L

                                               = 1M x 28.01x10-3 L    

                                              = 28.01x10-3 mol

Therefore the number of moles of NaOH added are 28.01x10-3 mol

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