C9.4 Reactivity series

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Last updated 4:04 AM on 6/8/26
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8 Terms

1
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State the order of the reactivity series

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2
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Describe the reaction of potassium with cold water

  • Reacts violently with cold water

<ul><li><p>Reacts violently with cold water</p></li></ul><p></p><p></p>
3
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Describe the reaction of sodium with cold water

  • Reacts quickly with cold water

<ul><li><p>Reacts quickly with cold water</p></li></ul><p></p>
4
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Describe the reaction of calcium with cold water

  • Reacts less strongly with water

<ul><li><p>Reacts less strongly with water</p></li></ul><p></p>
5
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Describe the reaction of magnesium with steam

  • Forms metal oxide and hydrogen gas

<ul><li><p>Forms metal oxide and hydrogen gas</p></li></ul><p></p>
6
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Describe reactions of metals (magnesium, zinc, iron, copper, silver and gold) with dilute acid

  • Only metals above hydrogen in the reactivity series will react with dilute hydrochloric acid

    • The more reactive the metal, the more vigorous the reaction

<ul><li><p>Only metals above hydrogen in the reactivity series will react with dilute hydrochloric acid </p><ul><li><p>The more reactive the metal, the more vigorous the reaction</p></li></ul></li></ul><p></p>
7
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How can order of reactivity be deduced?

  • Can be deduced by making experimental observations

    • More vigorous reaction = more reactive metal

    • Greater temperature change during a reaction = more reactive metal

  • Two metals placed in water:

    • More vigorous reaction is the more reactive metal

  • If they don’t react with water, they can be placed in hydrochloric acid

8
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Explain reactivity

  • Metals form positive ions by losing electrons when they react with other substances

  • More reactive metals lose electrons more easily

  • Metals displace any metal below it in the reactivity series

    • More reactive metals lose electrons to form ions more easily, which makes them better reducing agents