Question

1. Effect of adding AgNO3
2. In a moment, you will be adding AgNO3 to your reaction system. Adding AgNO3 should affect the concentration of which species in the equilibrium reaction? Would it increase or decrease the concentration?
3. According to Le Chatelier’s principle, predict which way the reaction should shift (left or right).
4. Now to test your prediction – to test tube #3, add several drops of 0.1M AgNO3 solution.
5. What do you observe happening? Report any color changes or other changes you observe.

Answer 1

Chemical reaction related to this equation is

AgCl(s) $\longleftrightarrow Ag^{+} (aq) + Cl^{-1}(aq)$

1. Adding AgNO₃ increases the $Ag^{+}$ concentration and the solution is no longer at equilibrium.
2. It would increase the concentration of silver ion .
3. As the concntration of silver ion which is present in product will increase will shift equilibrioum to backward.
4. A white ppt of AgCl forms.