2. Iron was added to dilute sulfuric acid. When the mixture was gently warmed, a gas was given off. a) Name and write the formula of the two ions present in dilute sulfuric acid. b) i) Suggest why the mixture had to be gently warmed. ii) What gas was given off? iii) What would you see that shows a gas was being given off? The iron disappeared and a pale green solution was formed. When more iron was added, the reaction eventually stopped and some iron was left. c) i) Explain why the reaction stopped. il) What is the name of the salt that gave the green colour to the solution? iii) How would you separate the excess iron from the green solution?​