Is using an acid/base indicator a physical change or a chemical change?

Subject: Is using an acid/base indicator a physical change or a chemical change?

Date: Wed Jun 7 19:37:26 2000
Posted by Bubbley Becky
Grade level: School: Mad Science LA
City: LA State/Province: CA Country: USA
Area of science: Chemistry
ID: 960421046.Ch

Message:


ex: Phenolphthalein & Sodium Carbonate turns pink.   Using Food coloring 
turns color too but that is a physicla change, right?  How are the two 
different if in fact using the indicator is a chemical chang

Re: Is using an acid/base indicator a physical change or a chemical change?

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