I think I did alright considering the ambiguity of the questions. When writing answers it felt like you had to make up too much to answer the question. There is going to be a lot of subjective marking going on for this exam. Hoping for 90+, but I'm not so sure. Transaction Processing Systems...
Yes that would be the only thing that it would have been because there was no contact between the acid and the crystals. I don't know what the colour change should have been. I put white to blue :S