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The pH of Orange Juice varies from about 3.3 to 4.2, which makes it weakly acidic. This would be orange on many UI papers, but they do vary so always compare the colour with the chart supplied.

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6y ago
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9y ago

pH paper changes color is varying acid-base levels. It can do this because the paper is impregnated with acid-base sensitive chemicals.

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Q: What color does the pH paper change in orange juice?
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