Grape juice indicator. Purple grape juice changes its color depending on the pH of the solution. Here grape juice was added to two household solutions: vinegar (mostly diluted acetic acid, CH3COOH) and baking soda solution (sodium bicarbonate, NaHCO3). Vinegar is acidic and turns grape juice pink/red. Baking soda is alkaline and turns grape juice dark green.

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TOP22304625

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達志影像

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RM

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