9.4 Reactivity Series (Cambridge (CIE) O Level Chemistry): Flashcards
Exam code: 5070
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What is the reactivity series?
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What is the reactivity series?
The reactivity series is a list of metals and some non-metals arranged in order of decreasing reactivity, from most reactive at the top to least reactive at the bottom.
The reactivity series in order from most to least reactive is: potassium, sodium, calcium, magnesium, aluminium, ______, zinc, iron, hydrogen, copper, silver, gold.
The reactivity series in order from most to least reactive is: potassium, sodium, calcium, magnesium, aluminium, carbon, zinc, iron, hydrogen, copper, silver, gold.
How do you use the reactivity series to predict whether a displacement reaction will occur?
A more reactive metal will displace a less reactive metal from a solution of its salt. If metal A is above metal B in the reactivity series, adding A to a solution of a B salt will produce metal B and a new salt.
A metal placed ______ hydrogen in the reactivity series will not react with dilute acids.
A metal placed below hydrogen in the reactivity series will not react with dilute acids.
True or False?
Carbon and hydrogen are included in the reactivity series even though they are not metals.
True.
Carbon and hydrogen are included as reference points: carbon shows which metals can be extracted by carbon reduction, and hydrogen shows which metals react with dilute acids.
Potassium, sodium and calcium react with cold water to produce a metal hydroxide and ______ gas.
Potassium, sodium and calcium react with cold water to produce a metal hydroxide and hydrogen gas.
Explain why aluminium appears less reactive than its position in the reactivity series suggests.
Aluminium appears less reactive because its surface is coated in a thin layer of aluminium oxide that prevents water and oxygen from reaching the metal beneath.
What is a displacement reaction?
A displacement reaction is a reaction in which a more reactive element displaces a less reactive element from a solution of its compound.
Metals are reactive because they tend to ______ electrons to form positive ions.
Metals are reactive because they tend to lose electrons to form positive ions.
Why are metals at the top of the reactivity series more reactive than those at the bottom?
Metals at the top of the reactivity series lose electrons more easily to form positive ions. The easier it is for a metal to lose electrons, the more reactive it is.
When magnesium is added to copper sulfate solution, magnesium ______ the copper because magnesium is more reactive.
When magnesium is added to copper sulfate solution, magnesium displaces the copper because magnesium is more reactive.
True or False?
Aluminium reacts as vigorously as expected from its position in the reactivity series.
False.
Aluminium appears less reactive than expected because its surface is coated in a thin layer of aluminium oxide, which acts as a barrier and prevents further reaction.
In a displacement reaction, the more reactive metal ______ electrons to the ions of the less reactive metal in solution.
In a displacement reaction, the more reactive metal loses electrons to the ions of the less reactive metal in solution.
What observations would you make when iron is added to copper sulfate solution?
The blue colour of the copper sulfate solution fades and a pink or brown solid (copper) is deposited as iron displaces copper from the solution.
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