Tuesday, April 27, 2010

Zinc oxide, white powder?

zinc oxide (a white powder) is heated. There is no change in weight but the white powder turned pale yellow on heating.


It turned white again on cooling.





What's the name the white powder left at the end of the experiment?Zinc oxide, white powder?
It's still zinc oxide. Zinc oxide turns yellow upon heating and white upon cooling without altering its chemical composition.

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