Question

2. Aqueous solutions of silver nitrate and potassium chloride can be mixed to precipitate silver

chloride, Calculate the mass of silver chloride that is formed in the reaction of 9.20 g silver

nitrate with 5.15 g potassium chloride.

Answer 1

AgNO₃+KCl->AgCl+KNO₃

M(AgNO₃)=108+14+16x3=170 g/mol

M(KCl)=39+35.5=74.5 g/mol

n(AgNO₃)=9.2/170=0.0541 mol

n(KCl)=5.15/74.5=0.0691 mol

Limited component is AgNO₃

M(AgCl)=108+35.5=143.5 g/mol

m(AgCl)=143.5x0.0541=7.76 g

Answer: 7.76 g of AgCl