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Verified answer
Fenolftalein; pH = 8,0 - 10,0 dan warnanya = Tidak bewarna - MerahBTB; pH = 6,0 - 7,6 dan warnanya = Kuning - Biru
Metil Merah; pH = 4,2 - 6,3 dan warnanya = Merah - Kuning