Question: why agcl precipitate before ag2cro4?
Answer: Does AgCl always precipitate before Ag2CrO4? The problem with this is that it assumes that the concentration of chloride ions is equal to the concentration of silver ions at precipitation in each. ... Hence, the only situation where this would hold is if [Cl] = sqrt(Ksp). The same goes for when AgCrO4 precipitates.