After forming a white substance while on the stove, I rinsed the Pyrex pot under tap water (from a well), whereupon the water in the pot turned purple. Why did this happen?

Iron and sulfur are present in the well water here.

Revision: I had prepared white tea in a white corning pot on the stove. After pouring out the tea I rinsed the pot with the tap water (well water) which turned a purplish color and then clear.

  • $\begingroup$ @airhuff Please remember to check for tags if you are editing a question’s grammar, wording and/or title. See for example here or here. $\endgroup$ – Jan Feb 10 '17 at 0:42
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    $\begingroup$ First of all, welcome to Chemistry.SE! I suggest that you start off by taking the tour to learn more about how this site works. Regarding your question, could you give a little more information? What was in the pot? Where was the white stuff, etc.? $\endgroup$ – airhuff Feb 10 '17 at 0:42
  • $\begingroup$ What were you cooking that formed the white substance? There could be some residue that caused it. $\endgroup$ – Imperator Feb 10 '17 at 1:01
  • $\begingroup$ Does it stay purple or change to red, brown, yellow, clear, etc. after a while? $\endgroup$ – airhuff Feb 10 '17 at 1:26

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