[hannah]

During our chemistry practical we determined the salinity of standard sodium chloride, seawater and estuarine water by titration and i need to calculate the molarity of the silver nitrate solution.

i have found the average volume for each solution. Is this the correct formula to use...

concentration of the silver nitrate solution x volume added/volume of sample in which the solution was added

if so, how do i find the concentration of the silver nitrate solution? i have a random figure which is 0.0498, could this be it?

Thanks 

[Borek]

Please describe what you did in details. From what data are you trying to determine AgNO₃ concentration?

Regardless of these details, balanced reaction equation will be your best friend.

[Arkcon]

Generally, for titration experiments, either in the classroom or in industry, you're given a general ballpark for the conc. of your titrant, silver nitrate in this case.

Your standard is, just that, a standard, in this case sodium chloride of rigorously known concentration.

And your saline environmental standards are your unknowns.

You use the concentration of sodium chloride standard to determine silver nitrate concentration, then use your determined silver nitrite concentration to determine concentration of the environmental samples.  Back and forth, like that.

Lets' start with a balanced equation, like Borek said.