[Eberth_Quezada]

Hello there,
I'm working on a lab which involves a couple of steps.
1st. i had to determine the molarity of my NaOH solution, standarizing it with a a sample of potassium hydrogen phthalate (KHC8H4O4). The formula for that reaction is the following: NaOH + KHC8H4O4 --> NaKC8H4O4 + H2O   My molarity came out as 0.0990 M of NaOH.

My problem is in the next part of the lab. in the second part, we are given an impure sample containing KHC8H4O4. then we are asked to find the percentage by mass of the KHC8H4O4 in the sample (which i found). BUT, in that part I'm asked to provide a balanced chemical equation for the reaction. Will this just be the same equations as the previous part, should i just used the net ionic equation, or am i missing something else?

Thank you very much. 

[Borek]

You may use same as before.