Q-What is the acid/base reaction on hydrangeas? I think it is like litmus paper-pink for acid, blue for base. A-Hydrangeas in the macrophylla, or ”large-leaved,” group, which include the ...

This educational film explores acid-base indicators and their color changes in response to acidity. It demonstrates how substances like tea, red cabbage, and litmus paper react when acids are ...

Similarly, the colors of many foods, including grapes, cherries, berries, plums, eggplant and cabbage, are due to pigments called anthocyanins, many of which behave as acid-base indicators.

Some argue that the acid amount was too small to affect the litmus. Research mentions that each milliliter of onion juice contains 1−22 μmol of lachrymator. If sulfuric acid had formed in a 1:1 ratio, ...

Learn how to test pH of food for canning in a water bath to ensure that you are meeting the requirements for high-acid foods. This is an educational tool and not a license to change lab-tested ...