Say, I preheat 50ml of 98% H2SO4 (sulphuric acid) and proceed with adding 25ml of 85% HCOOH (formic acid).
The result of which is:
H2SO4 + HCOOH -> CO + H2O
Sulphuric acid will dehydrate formic acid producing CO, however gas could still be contaminated with vapor. What is the correct way of removing these impurities?