Question

Silver nitrate solution was mixed with 5g of sodium chloride solutions to verify law of conservation of mass. 8.1g of silver chloride was formed and sodium nitrate formed was equal to half of the amount of silver nitrate solution used what is the amount of silver nitrate used and sodium nitrate formed

Answer 1

$$\begin{gathered} AgN{O}_3+NaCl=AgCl+NaN{O}_3 \\ xg5g=8.1+y \\ Sincey=\frac{x}{2} \\ Andthegivenequationobeylawofmassaction \\ x\hspace{0.17em}+5=8.1+\frac{x}{2} \\ x-\frac{x}{2}=8.1-5 \\ \frac{x}{2}=3.1 \\ x=3.1\times 2=6.2g \\ y=\frac{x}{2}=\frac{6.2}{2}=3.1 \\ Nowsubstituteandverifythelawofmassaction \\ 6.2+5=8.1+3.1 \\ 11.2g=11.2g \\ SoAgN{O}_{3}used=6.2g \\ NaN{O}_{3}formed=3.1g \end{gathered}$$