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Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity. In an acidic medium, blue litmus paper turns red, while in a basic or alkaline medium, red litmus paper turns blue. In short, it is a dye and ...
In politics, a litmus test is a question asked of a potential candidate for high office, the answer to which would determine whether the nominating official would proceed with the appointment or nomination.
Litmus test may refer to: Litmus test (chemistry) , used to determine the acidity of a chemical solution Litmus test (politics) , a question that seeks to find the character of a potential candidate by measuring a single indicator
Democrats will be looking to regroup while Republicans will be looking to grow their electoral advantages in 2025, when attention will turn to a handful of off-year races. While the electoral ...
Rosenberg expects consumers will begin to slow their spending dramatically in the fourth quarter, especially with gas prices rising toward $100 per barrel, calling the period a “litmus test ...
FIRST ON FOX: Senate Minority Whip John Thune, R-S.D., responded to President-Elect Donald Trump's newly announced litmus test for those vying to be the next GOP leader, exclusively telling Fox ...
Litmus, used by alchemists in the Middle Ages and still readily available, is a naturally occurring pH indicator made from a mixture of lichen species, particularly Roccella tinctoria. The word litmus is literally from 'colored moss' in Old Norse (see Litr). The color changes between red in acid solutions and blue in alkalis.
A pH indicator (which can indicate acidic or basic substances) called litmus is a dye extracted from the lichen Roccella tinctoria ("dyer's weed") [156] by boiling. It gives its name to the well-known litmus test.