TURTLE ROCK SCIENTIFIC / SCIENCE PHOTO LIBRARY TURTLE ROCK SCIENTIFIC / SCIENCE PHOTO LIBRARY
Blackcurrant juice indicator. Blackcurrant juice changes its colour depending on the pH of the solution. Here blackcurrant juice was added to a to an acidic solution (left beaker, white vinegar, CH3COOH) and an alkaline solution (right beaker, baking soda, NaHCO3).
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