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pH INDICATOR: BROMOTHYMOL BLUE<br />
Three different solutions<br />
Left to Right: Ammonium chloride solution (yellow) pH 5-5.5.  Ammonium acetate solution (blue-green) pH 7.  Sodium acetate solution (blue) pH 9.

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pH INDICATOR: BROMOTHYMOL BLUE
Three different solutions
Left to Right: Ammonium chloride solution (yellow) pH 5-5.5. Ammonium acetate solution (blue-green) pH 7. Sodium acetate solution (blue) pH 9.

Copyright:© 1995 Richard Megna - Fundamental Photographs

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Richard Megna