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📎Example
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📝How do we know a reaction has taken place?
📎Example scenario
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When we react sulphuric acid and copper (II) oxide, it changes colour. When we filter it through a funnel to remove the unreacted copper (II) oxide, the substance is a blue colour.
We can then evaporate the water from it to create a salt.
Other signs that a reaction has occurred include:
○ Slight temperature increase
📌Main Points
🔅General (word) equation is: Metal Oxide + Acid → Salt + Water
🔅Colour change and temperature change are signs a reaction has occurred.
