pH scale + Universal Indicator + Litmus Paper
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what is a pH scale for?
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Measuring how strong or weak and acid and base is
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What is neutral on the pH scale?
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pH 7
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What is a strong acid in on the pH scale?
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pH 0-2
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What is a weak acid on the pH scale?
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pH 3-6
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What is a weak base on the pH scale?
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pH 8-12
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What is a strong base on the pH scale?
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pH 13-14
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What is the colour of a strong acid on the pH scale + Universal indicator?
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Red
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What is the colour of a weak acid on the pH scale + universal indicator?
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Orange and yellow
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What is the colour of a neutral substance on the pH scale + universal indicator?
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Green
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What is the colour of a weak base on the pH scale + universal indicator?
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Blue
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What is the colour of a strong base on the pH scale + universal indicator?
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Purple and violet
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What colour does an acid go on red litmus paper?
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Red
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What colour does a base go on a red litmus paper?
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Blue
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What colour does a base go on blue litmus paper?
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Blue
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What colour does an acid go on blue litmus paper?
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Red
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If a substance were neutral what colour would it go on both red and blue litmus paper?
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The colour would stay red on red litmus paper and blue on blue litmus paper
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Why is universal indicator better than litmus paper?
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Universal indicator tells the pH scale as well as the type of substance and it is quicker
