Sulfur dioxide dichloride, SO2Cl2, reacts with water to give a mixture of sulfuric acid and hydrochloric acid. A pure sample of SO2Cl2 was dissolved in water and made up to 250 cm3. A 25.0 cm3 portion of this solution required 0.10 mol of NaOH for neutralisation. What is the number of moles of SO2Cl2 dissolved in water?