A saturated solution of potassium chloride was prepared at x°C. if 30cm³ of the solution required 22.5cm³ of silver trioxonitrate(v) solution containing 34g in 100cm³ solution for complete precipitation, calculate the solubility of potassium chloride at x°C in mol/dm³.[take KCL = 74.5, AgNO₃ = 120]

• A.1.5mol/dm³
• B.2.0mol/dm³
• C.0.15mol/dm³
• D.0.20mol/dm³