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Creado por jennifersnowbell
hace más de 10 años
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Pregunta | Respuesta |
List the Reactivity Series in order. | Potassium, Sodium, Calcium, Magnesium, Aluminium, Zinc, Iron, Lead, Copper, Silver, Gold |
More reactive metals are harder to extract from their ores. What do they need? | Electrolysis- when chemical energy breaks down the ores |
Why does aluminium seem so unreactive when it's high up in the reactivity series | When aluminium reacts with oxygen, it makes a protective oxide layer which stops further reactions. |
What will happen to most metals when they react with air? | They tarnish; makes a dull layer of metal oxide on surface. |
What happens when magnesium, lead and silver is burnt in air? | Magnesium- burns violently Lead- reacts slowly Silver- no reaction |
Metal+Oxygen= | Metal Oxide |
More reactive metals react vigourously with ........ water to produce ........ | cold, hydroxides |
Less reactive metals react quickly with ...... to produce....... | steam, oxides |
Metal + Water = Less Reactive Metal+ Steams= | Metal Hydroxide + Hydrogen Metal Oxide + Hydrogen |
The lower the ........, the ..... visible the reaction of metals with acid. | reactivity, less |
Metal + Acid= | Salt + Hydrogen |
What is the test for hydrogen? | When a lit splint is near hydrogen, there will be a squeaky pop. |
What does Displacment mean? | Taking place of |
What is the rule for displacement reactions? | A more reactive metal will displace a less reactive metal. |
Magnesium + Copper Sulphate= Copper + Zinc Sulphate= | Magnesium Sulphate + Copper No change |
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