[Maizeyh75]

Hi there, 
I am very stuck trying to work out end points of my titrations;
I have drawn up two graphs of a Choride ion Titration & a 'blank' assay & i am to subtract the volume of one from the other in order to find the volume of AgN03 That titrated the chloride bound up in the drug.
Do i subtract the end points from one another & how can i be sure i have found the correct end points?

I really have no clue & then from this i'm to find the moles of chloride present & from this the moles of drug present.
Any guidelines for finding this i'd really appreciate it!
 

[mahrap]

Your end point should simply be the point at which the solution showed a color change due to the reaction of the indicator in it with the titrant. Are you talking about the equivalence point?

[Maizeyh75]

Sorry my question is probably not clear enough;
What i was trying to do was subtract the volume of one titration from the other (Chloride ion Titration - assay volume) in order to obtain the volume of AgNo3 that titrated the choride bound up in the drug.
So I wasn't sure how exactly to do this! I plotted both titrations on a graph and from this got the 'equivalence' point it must be & then my guess was to subtract these from each other to get the volume of these titrations???

[Borek]

Technically yes, you should subtract blank from the volume obtained during normal titration.

[Maizeyh75]

Thank you so much; you guys are amazing & wonderful human beings helping me out so altruistically.
Its inspiring & does my ♥ good.
May God bless you!