Common indicators include litmus, turmeric, methyl orange, and phenolphthalein. Litmus turns red in acidic solutions and blue in basic solutions, while turmeric changes color from yellow to reddish-brown. Methyl orange and phenolphthalein exhibit color changes at specific pH ranges, with methyl orange turning red in acidic solutions and phenolphthalein turning pink in basic solutions.
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Common indicators used to test for acids and bases include litmus paper, phenolphthalein, methyl orange, and universal indicator solution. Litmus paper turns red in acidic solutions and blue in basic solutions. Phenolphthalein transitions from colorless to pink in basic solutions. Methyl orange shifts from red in acidic solutions to yellow in basic solutions. Universal indicator solution provides a full range of colors to indicate the pH of a solution, from red (acidic) to purple (neutral) to blue (basic).