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Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols in experiments. It is a weak acid, which can lose H + ions in solution. The nonionized phenolphthalein molecule is colorless and the double deprotonated phenolphthalein ion is fuchsia. Further proton loss in higher pH occurs slowly and leads to a colorless form.
Margaret Petherbridge Farrar (March 23, 1897 – June 11, 1984) was an American journalist and the first crossword puzzle editor for The New York Times (1942–1968). Creator of many of the rules of modern crossword design, she compiled and edited a long-running series of crossword puzzle books – including the first book of any kind that Simon & Schuster published (1924). [1]
Phenolphthalein can be synthesized by the condensation of phthalic anhydride with two equivalents of phenol under acidic conditions (hence the name). It was discovered in 1871 by Adolf von Baeyer . [ 8 ] [ 9 ] [ 10 ]
Play the USA TODAY Crossword Puzzle.. Sunday Los Angeles Times crossword Sunday New York Times crossword Sunday Premier crossword SUDOKU. Play the USA TODAY Sudoku Game.. JUMBLE. Answer: PUDDLE ...
Find answers to the latest online sudoku and crossword puzzles that were published in USA TODAY Network's local newspapers. Puzzle solutions for Tuesday, Nov. 5, 2024 Skip to main content
A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one letter, while the black squares are used to ...
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A plural clue always indicates a plural answer and a clue in the past tense always has an answer in the past tense. A clue containing a comparative or superlative always has an answer in the same degree (e.g., [Most difficult] for TOUGHEST). [6] The answer word(s) will not appear in the clue itself. The number of words in the answer is not ...