Celery has a pH level between 5.7-6 and lemon juice has a pH level between 2-2.6. That lower acidic level is why some cooks swap celery for lemon. We won't get into complicated conversion ...

Just mix four ounces of lemon juice with a quart of white vinegar, and you've got a potent spray that can stop wild growth in its tracks. By lowering the pH levels, this citrus combo dries out ...

Its color changes from blue in a neutral solution to red in acidic solution and yellow in basic. The lemon juice (pH = 2) in this drink creates a bilayer concoction that swirls to a beautiful ...