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Unformatted text preview: A positive test is needed for each of the substances to compare the results of the unknown in order to match it with one of the substances. What is a false positive? A false positive gives you the same reaction but it is not the same substance. Different substances can have similar reactions and therefore, the results can be misleading. Heavy Metal Test Potassium Chromate Lead Highlighter Yellow Mercury Yellow – Orange Unknown Highlighter Yellow...
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- Spring '11
- Primary color, pH Alka Seltzer, Bubbled Thickened Dissolved