pH Indicators (Litmus, Phenol Red, Universal Indicator)

Litmus

There are two types of Litmus Paper: Red and Blue. Red Litmus Paper turns blue when it is dipped in a solution of pH 8.3 or more (stronger alkalis), and Blue Litmus Paper turns red when dipped in a solution of pH 4.5 or less (stronger acids)

Phenol Red

Phenol Red turns yellow when it is dipped in a solution of pH 6.6 or less (stronger acids), and turns fuschia when dipped in a solution of pH 8.0 or more (stronger alkali)

Universal Indicator

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Just heard: Leo Laporte and the TWiTs – TWiT 117: Jeff’s Honkin’ Laugh
via FoxyTunes

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