Opposite of Acid on the Ph Scale
This page is the CodyCross answer for the clue below from Forms of Communication, Group 2233, Puzzle 2 (Rotary Dial).
Question is: Opposite of Acid on the Ph Scale
and the answer is: ALKALI
Word Meaning:
ALKALI — (chemistry) One of a class of caustic bases, such as soda, soda ash, caustic soda, potash, ammonia, and lithia, whose distinguishing characteristics are dissolving in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue.
Definitions from Wiktionary.