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pH METER & INDICATOR: BROMOTHYMOL BLUE pH Range 3.5-9.5<br />
(1 of 3)<br />
Sodium Chloride (aq) has a pH of 7. Indicator color is green.

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pH METER & INDICATOR: BROMOTHYMOL BLUE pH Range 3.5-9.5
(1 of 3)
Sodium Chloride (aq) has a pH of 7. Indicator color is green.

Copyright:© 1990 Richard Megna - Fundamental Photographs

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Richard Megna