The determination of cyanide ions (CN-) is carried out according to the Mohr method: a titrating solution of silver nitrate (AgNO3) is gradually added to the aqueous sample until a red precipitate corresponding to the silver (I) chromate (Ag2CrO4) appears. To observe the titration endpoint, a small amount of Sodium Chromate is added to the aqueous sample. From the solubility product of Ag(CN)(s), calculate the maximum concentration of Ag+ ions allowed in solution in equilibrium with the solid phase.