Gravimetric Determination of Iron as Fe2O3 1. What is the role of HCI in this process? 2. What is the role of HNO3 in this process? 3. What do you think will happen to the analysis if you do not subject the crucibles to heating to constant mass? 4. What litmus paper (red or blue) shall be used to determine if the solution is basic? 5. Why do you need to change the pH of the mixture to basic? 6. Why do you need to cool the crucibles first to room temperature before storing them inside the desiccator? 7. What will be the effect if the precipitate