why should AgCl be washed with dilute HNO3 in gravimetric analysis

Question

why should AgCl be washed with dilute HNO3 in gravimetric analysis

 

 

 

 

 

Answer 1

I don't know the rest of the conditions, and which element are you measuring specifically, but generally speaking, you want to wash off the excessive Ag+ ions, and keep the AgCl precipitate free from other contaminants, hence the dilute HNO3