Video duration: 251 seconds
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We are looking at the following acid-base indicators: methyl orange, methyl red, bromothymol blue, litmus, phenolphthalein and indigo carmine. Consider that these indicators all have their effective pH range at which they turn colours.
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Video duration: 511 seconds
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You can experiment with different household items and determine their pH in general terms using a red cabbage indicator. This video supports EME3410 Integrating Technology into the Classroom.