Comparing metals with reactivity
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Reactive | strong drive to become a compound
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| Potassium with water | very violent with cold water, catches fire, produces: hydrogen and potassium hydroxide
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| Sodium with water | violent with cold water, produces: hydrogen and sodium hydroxide
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| Calcium with water | less violent with cold water, produces: hydrogen and calcium hydroxide
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| Magnesium with water | very slow reaction with cold water, vigorous with steam, produces hydrogen and magnesium oxide
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| Zinc with water | quite slow with steam, produces: hydrogen and zinc oxide
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| Iron with water | slow with steam, produces: hydrogen and iron oxide (rust)
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| Copper/Silver/Gold with water | no reaction
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| Magnesium with HCl | vigorous, produces: hydrogen and solution of magnesium chloride
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| Zinc with HCl | quite slow, produces: hydrogen and zinc chloride
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| Iron with HCl | slow, produces: hydrogen and iron (ii) chloride
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| Lead with HCl | slow, only if concentrated, produces: hydrogen and lead (ii) chloride
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| Copper/Silver/Gold with HCl | no reaction even if conc.
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| Hydrogen displacement | Hydrogen is displaced by a more reactive metal
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| Competing to be the compound in solution | A metal will always displace a less reactive metal from solutions of its compounds
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| Competing for oxygen | When a metal is heated with the oxide of a less reactive metal, it acts as a reducing agent. It is always exothermic –gives out heat
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| Oxidation | gain of oxygen, loss of electrons, loss of hydrogen
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| Reduction | loss of oxygen, gain of hydrogen/electrons
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