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Use red cabbage juice as an indicator of the relative pH of common household substances. After students test each substance, they create a pH scale using the color variation as a guide for pH level. Finally, students use pH paper to determine the actual pH of the substances previously tested. They will compare the actual pH to their created pH scale.
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This resource received a 3* rating because it is part of Acids and Bases, which received a rating of 3-Exemplary in the Curriki Review System and which you can see here: http://www.curriki.org/xwiki/bin/view/Coll_MickiHR/AcidsandBases?bc=