pH Rainbow Tube

pH Rainbow Tube

Introduction In this demo, the teacher creates a beautiful rainbow of colours in a demonstration tube using universal indicator and a dilute acid and base. Discussion Universal indicator can be used to illustrate an entire range of pH conditions because it is made up...
Diluting Acids

Diluting Acids

Diluting acids to prepare a solution of a required concentration requires skill, training and common sense.  This Flinn Scientific video offers good, practical advice on how to prepare dilute acid solutions.  A safer alternative to working with concentrated acids is...
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