2.28 - 2.32 Acids, alkalis and titrations

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Last updated 6:27 AM on 5/14/26
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10 Terms

1
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How to use phenolphthalein to distinguish between acidic and alkaline solutions

Alkaline - pink

Acidic - colourless

2
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How to use methyl orange to distinguish between acidic and alkaline solutions

Alkaline - yellow

Acidic - red

3
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How to use litmus solution to distinguish between acidic and alkaline solutions

Alkaline - blue

Acidic - red

4
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How to use litmus paper to distinguish between acidic and alkaline solutions

Blue litmus paper goes red in acidic and stays blue in alkaline

Red litmus paper goes blue in alkaline and stays red in acidic

5
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How to read pH scale

pH 7 is neutral

< pH 7 is acidic (0 is strongest acid)

> pH 7 is alkaline (14 is strongest alkali)

6
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How to use the universal indicator to measure the pH of an aqueous solution

Add drops of solution to universal indicator paper and observe what colour it goes

<p>Add drops of solution to universal indicator paper and observe what colour it goes</p>
7
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What does acids in aqueous solutions produce

H+ ions (hydrogen ions)

8
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What do alkalis in an aqueous solution produce

OH- ions (hydroxide ions)

9
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What is a neutralisation reaction

Reaction between an acid and base

10
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What is the ionic equation for any alkali- acid neutralisation reaction

H+ (aq) + OH- (aq) → H2O (l)