What does the colour ORANGE/YELLOW mean on the PH scale?
Strongly ALKALI!
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What are BASES?
Substances that can react with acids and NEUTRALISE them to make them a salt and water called Bases! They're usually metal oxides or metal hydroxides. They also have a pH of more than 7!
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What are ALKALIS?
An ALKALI is a base that dissolves in water.
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Why isn't Copper Oxide an alkali?
Copper Oxide does not dissolve in water!
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Why is Sodium an alkali?
Sodium is an alkali because it dissolves in water.
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When are salts made?
Salts are made when an acid reacts with a BASE, CARBONATE or METAL! Or during neutralisation reactions!
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What does the name of the salt depend on?
It depends on the metal in the base and the acid used. For example, Salts made using Hydrochloric acid are called Chlorides.
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What happens when ACIDS dissolve in water?
When acids dissolve in water, they produce aqueous hydrogen ions, H+(aq). For example, looking at hydrochloric acid:
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What happens when ALKALIS dissolve in water?
When alkalis dissolve in water, they produce aqueous hydroxide ions, OH-(aq). For example, looking at Sodium Hydroxide:
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What happens when acid and alkali react?
When the H+(aq) ions from an ACID react with the OH-(aq) from an ALKALI, a neutralisation reaction occurs to form water!
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Other cards in this set
Card 2
Front
What does the colour RED mean on the pH scale?
Back
Strongly ACIDIC!
Card 3
Front
What does the colour ORANGE/YELLOW mean on the PH scale?
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