Acid: pH 1 - 6, Universal Indicator: red - orange - yellow, Release H+ ions (Hydrogen), Hydrochloric eg. HCl, Sulfuric eg. H2SO4, Nitric eg. HNO3, Tastes Sour, Base: pH 8 - 14, Universal Indicator: turquoise - blue - purple, Release OH- ions (hydroxide), Metal oxides eh. Na2O, Metal hydroxides eg. NaOH, Metal carbonates eg. Na2CO3, Metal hydrogen carbonates eg. NaHCO3, Tastes Bitter, Neutral: pH 7, Universal Indicator: green, Equal amounts of H+ and OH- (make H2O), Water eg. H2O, Salt eg. NaCl, Tastes Neutral,

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