The best way to determine the concentration of AgNO3 dissolved in solution is by precipitation using a chloride.
Precipitation is one of the oldest and handy methods of chemical analysis. It involves the addition of a reagent which is known to form a precipitate with the test solution.
The precipitate is now recovered from solution, dried and weighed. Stoichiometric calculations show the amount of the test substance dissolved in the test solution.
In this case, NaCl can be used to carry out a precipitation as follows;
AgNO3(aq) + NaCl(aq) -------> AgCl(s) + NaNO3(aq)
The AgCl precipitate is recovered dried and weighed and then the amount of AgNO3 in the dissolved solution is determined.
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