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Chemistry

Acids, Alkalis and Indicators (Section 4)

QuestionAnswer
What colour are strong acids in universal indicator? Red
What colour are weak acids in universal indicator? Orange/yellow
What colour is neutral in universal indicator? Green
What colour are weak alkalis in universal indicator? Blue
What colour are strong alkalis in universal indicator? Purple
What colour is litmus paper in acidic solutions? Red
What colour is litmus paper in alkaline solutions? Blue
What colour is litmus paper in neutral solutions? Purple
What colour is phenolphthalein in acidic solutions? Colourless
What colour is phenolphthalein in neutral solutions? Colourless
What colour is phenolphthalein in alkaline solutions? Pink
What colour is methyl orange in acidic solutions? Red
What colour is methyl orange in neutral solutions? Orange
What colour is methyl orange in alkaline solutions? Yellow
Acid + base --> _________ + _________ salt + water
An acid is a source of ________ ions hydrogen (H+)
An alkali is a source of __________ ions hydroxide (OH-)
What is a base? A substance that can neutralise an acid
Are acids proton donors or acceptors? Donors
Are bases proton donors or acceptors? Acceptors
What kind of base is an alkali? A soluble base
Acid + metal oxide ---> _____ + ______ salt + water
Acid + metal hydroxide ---> _______ + _______ salt + water
Acid + ammonia ---> ________ ammonium salt
Acid + metal carbonate ---> _______ + _______ + ________ salt + water + carbon dioxide
Created by: JoeMather
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