A saturated solution of potassium chloride was prepared at \(X^{\circ} \mathrm{C}\). If \(30 \mathrm{~m}^{3}\) of this solution required \(22.5 \mathrm{~cm}^{3}\) of silver trioxonitrate (V) solution, containing \(34 \mathrm{~g}\) in \(100 \mathrm{~cm}^{3}\) solution for complete precipitation. Calculate the solubility of potassium chloride at \(\mathrm{X}^{\circ} \mathrm{C}\) in moldm \({ }^{-1} \quad\) (take \(\mathrm{KCl}=74.5\), \(\left.\mathrm{AgNO}_{3}=170 \right)\)
A. \(1.5 \mathrm{moldm}^{-3}\) B. \(2.0 \mathrm{moldm}^{-3}\) C. \(0.15 \mathrm{moldm}^{-3}\) D. \(0.20\) moldm \({ }^{-3}\)