1. The problem statement, all variables and given/known data SO3 is not absorbed in water directly to form sulfuric acid because A. Reaction doesn't go to completion B. Reaction is slow. C. Highly exothermic. D. Insoluble 2. Relevant equations -------------- 3. The attempt at a solution MY understanding: Because it results in the formation of mist or acid particles in air which does not condense easily. From this I conclude that the answer is either C or D because the reaction does occur even though we don't get the product in the desired state and formation of mist doesn't seem slow to me...... Can anyone please clarify?