Indicators 0.0 / 5 ? ChemistryAcids, bases and saltsIGCSEEdexcel Created by: abby_edmonstoneCreated on: 04-02-20 07:25 List 5 indicators. Universal Indicator. Methyl Orange Indicator. Phenolphthalein Indicator. Litmus Paper (red & blue). 1 of 14 What colour does universal indicator turn in presence of an acid? Yellow for a weak acid, red for a strong acid. 2 of 14 What colour does universal indicator turn in presence of an alkali? Green for a weak acide, purple for a strong acid. 3 of 14 What colour does methyl orange indicator turn in presence of an acid? Red for a strong acid, yellow for a weak acid. 4 of 14 What colour does methyl orange indicator turn in presence of an alkali Yellow for a weak alkali and a strong alkali. 5 of 14 What colour does phenolphthalein indicator turn in presence of an acid? Colourless for any acid. 6 of 14 What colour does phenolphthalein indicator turn in presence of an alkali? Pink-- gradually gets darker as pH gets higher. 7 of 14 What colour does red litmus paper turn in presence of an acid? Stays red. 8 of 14 What colour does red litmus paper turn in presence of an alkali? Turns blue. 9 of 14 What colour does blue litmus paper turn in presence of an acid? Turns red. 10 of 14 What colour does blue litmus paper turn in presence of an alkali? Stays blue. 11 of 14 Give examples of acids. Strong acid=Hydrochloric Acid. Weak acid=Vinegar 12 of 14 Give examples of alkalis. Strong alkali=Sodium Hydroxide. Wealk alkali=Ammonia 13 of 14 Give examples of neutral solutions. Sodium Chloride. 14 of 14
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