$KCl$ ve inert madde i$$eren numuneden $2,0g$ tart$$larak saf su ile $250mL\text{'}$ye tamamlanm$$ ve bu $$zeltiden al$$nan $25ml$ 'lik k$$sma$,0\mathrm{.}098M20ml$ g$$m$$ nitrat $(AgN{O}_3)$zeltisi eklenmi$$tir$.$

$A{g}^{+}+C{l}^{-}$AgCldarr

$AgN{O}_3^{\text{'}}$ In fazlas Volhard y$$ntemine g$$re potasyum tiyosiyanat $(KSCN)$zeltisi ile geri titre edilmi$$tir$.$

$A{g}^{+}+SC{N}^{-}$AgSCN

Geri titrasyonda $0,099$ M $9,8$ mL KSCN harcanm$$t$$r$.$ Numunedeki $\%$ KCl miktar$$n$$ bulunuz?$($ K:$39$ g$/$mol; $Cl$:$35,5\frac{g}{m}ol)$

$2\mathrm{.}0g$ of the sample containing $KCl$ and inert substance was weighed and made up to $250mL$ with pure water, and $20mL$ of $0\mathrm{.}098M$ silver nitrate solution was added to the $25mL$ portion taken from this solution.

Excess silver nitrate was back titrated with potassium thiocyanate according to the Volhard method.

$0\mathrm{.}099M$ and $9\mathrm{.}8mL$ of KSCN were spent in the back titration. What is the $\%$ KCL amount in the sample?

$($K: $39\frac{g}{m}ol,Cl$:$35\mathrm{.}5\frac{g}{m}ol)$