2

Adding $\ce{HCl}$ to silver nitrate solution causes silver chloride to precipitate. Adding more $\ce{HCl}$ causes the silver to re-dissolve. What is happening to the silver chloride when it re-dissolves?

ron
  • 84,691
  • 13
  • 231
  • 320
Dale
  • 2,664
  • 1
  • 26
  • 37

1 Answers1

5

The precipitation reaction is: $$\ce {Ag+ + Cl- -> AgCl_{(s)}}$$ The next reaction is: $$\ce {AgCl_{(s)} +Cl- -> AgCl2- }$$

LDC3
  • 8,136
  • 22
  • 42
  • 1
    It might be useful to include the equilibrium constants for the two reactions: AgCl's k_sp is 1.77e-10 (so 5.6e9 for the equation as written), and the k_f for AgCl2- is 1.1e5. – Michael DM Dryden Nov 08 '14 at 17:55