AQA · Chemistry · 8462
GCSE Chemistry (AQA): The Reactivity Series & Displacement Reactions
Topic 4 — Chemical Changes. Generated from the caption track of Cognito's lesson video "GCSE Chemistry - The Reactivity Series - Metal Reactions | Displacement Reactions (2027/28 exams)"; each card deep-links to the moment in the video it came from. Lesson 4.06 of Cognito's AQA GCSE Combined Science (Trilogy) and Chemistry course (Higher tier), filed under AQA Chemistry 8462. Teaching by Cognito — https://cognitoedu.org/coursesubtopic/c2-gcse-aqa-h-c_4.06.
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Why does nothing happen when copper is added to iron sulfate solution?
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Copper is less reactive than iron, so it cannot displace it.
What are the products of the reaction between lithium and water?
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Lithium hydroxide and hydrogen.
Why are carbon and hydrogen included in the reactivity series despite not being metals?
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They act as reference points to compare the reactivity of metals against.
What does the reactivity of a metal measure?
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How easily the metal loses its outer shell electrons to form positive ions.
What two products form when a metal reacts with water?
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A metal hydroxide and hydrogen.
Which group of metals is the most reactive in the reactivity series?
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The group 1 metals.
Besides observing how violent a reaction is, how else can metal reactivity be compared quantitatively?
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By measuring the temperature change — the most reactive metals release the most heat.
In a displacement reaction, a ? reactive metal displaces a less reactive one from its compound.
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What are the products of the reaction between potassium and hydrochloric acid?
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Potassium chloride and hydrogen.
What two products form when a metal reacts with an acid?
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A salt and hydrogen gas.
Which property of the metal samples must be kept the same to make a metal–acid reactivity comparison a fair test?
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The same mass and the same surface area for each metal sample.
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