A solution contains an unknown mass of dissolved silver ions. When potassium chloride is added to the solution, a white precipitate forms.

Question

The precipitate is filtered and dried and then found to have a mass of 248mg . What mass of silver was in the original solution? (Assume that all of the silver was precipitated out of solution by the reaction.)

I was just wondering what equation to use. I was not given a balanced equation.

Answer 1

AgNO₃ + KCL -->  AgCl + KNO₃      

 

 

Because NO₃ , Ag, K and Cl all have either a +1 or -1 Charge the equation is balanced

 

 

The precipitate is Silver Chloride then do your mass stoichiometry to solve for mass of Ag.