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PHENOL RED: ACID-BASE INDICATOR.In Solutions of HCl(aq), NaOH(aq) & NaCl(aq)
Left to Right: Phenol red is YELLOW in an acid solution of 0.10M hydrochloric acid, ORANGE in a neutral solution of 0.10M sodium chloride and RED in a basic solution of 0.10M sodium hydroxide. The effective range of phenol red is about pH 6.8 to 8.4.
Copyright:© 1998 Richard Megna - Fundamental Photographs
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