$$ Find molurity of chloride in $25mL$ solution to which a few drops of $H_{2}Cr$ oy were addea if endpoint is $20ml$ oh $0\mathrm{.}07$MAgNO$3$

reucternt $1$:$1$ ratic.

$=>0\mathrm{.}1946g$ of samme of lead ox conteisinting $Pb(N{O}_3)$ is reulter with excess yquous $P{b}_{3}A{s}_5.$ After filtering $6\mathrm{.}0814g$ of white precipitate forme what is purity of lead