Can I use bottled water, spring water, or tap water instead of distilled water for the experiment?
NO!! It is very important that you use distilled water and not tap or spring water. Depending on the minerals that are present in your tap or spring water, the boiling point could be off by as much as 2 or 3 degrees! Distilled water may also be labeled demineralized water and this is fine to use. In the U.S., many pharmacies and drug stores carry distilled water and it usually costs about $1/gallon.
