1. The problem statement, all variables and given/known data This is for an experiment. I determined the theoretical diffusion ratio of ammonia to hydrogen chloride to be 1.46:1 but my experimental error to be 4.20:1. This means that my percent deviation was around 200%. Question is, what are the reasons for the large percentage deviation. 2. The attempt at a solution I know that one reason is obviously a reading error, but what about other stuff like non ideal gas behaviour, how would I elaborate on that?