pH1, Strong Acid, pH5, Weak Acid, pH7, Neutral, pH8, Weak Alkaline, pH14, Strong Alkaline, Universal indicator paper, Litmus paper, red, Litmus paper turns this colour to indicate an acid., blue, Litmus paper turns this colour to indicate an alkali., pink, Phenolpthalein turns this colour to indicate an alkali, colourless, Phenolpthalein turns this to indicate an acid, green, Universal indicator goes this colour in water, yellow, Methyl Orange turns this colour to indicate an alkali, purple, Universal indicator goes this colour in strong alkalis

KS5 Indicators

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