Acids: pH less than 7, pH = 1, sour, universal indicator colors (red), methyl orange (red), phenolthalein color (colorless), turns blue litmus red, , , , [H+], donates a proton, H2SO4, HNO3, Bases: pH greater than 7, pH = 13, bitter, universal indicator color (blue), methyl orange color (yellow), phenolthalein color (pink!), turns red litmus blue, sodium hydroxide, , , [OH-], accepts a proton, CuO, NaOH,

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