Demonstration of the colours of blue litmus indicator in first alkali (right) and then acid (left). The compound is blue in solutions with a pH above 8.3 (alkaline), and red in solutions below pH 4.5 (acidic).
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WebID:
C01807651
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RM
Super High Res Size:
1920X1080
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00:00:13.000
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25 fps
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200X112 (0.00 M)
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