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Acids and alkalis

Reactions of acids with metals

Reactions of acids with metals

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Summary


Reactions of acids with metals

In a nutshell

Reacting a metal with an acid forms a salt and hydrogen. Certain metals react more violently with acids than others. 


Equations

Reactants

Products

​acid + metalacid\ +\ metalacid + metal​​
​→\rightarrow→​​
​salt + hydrogensalt\ +\ hydrogensalt + hydrogen​​​


​

Reacting metals with acids 

The general formula for reacting metals with acids is:


​acid +metal →salt +hydrogenacid\ + metal\ \rightarrow salt\ + hydrogenacid +metal →salt +hydrogen​

​​
Science; Acids and alkalis; KS3 Year 7; Reactions of acids with metals
1.
Hydrogen bubbles
2.
Potassium (very reactive)
3.
Magnesium (moderate reactivity)
4.
Tin (low reactivity)
5.
Gold (unreactive)

​

Example


​calcium + sulfuric acid → calcium sulfate + hydrogen Ca + H2SO4 → CaSO4 + H2calcium\ +\ sulfuric\ acid\ \rightarrow\ calcium\ sulfate\ +\ hydrogen\\\>\\Ca\ +\ H_{2}SO_{4}\ \rightarrow\ CaSO_{4}\ +\ H_{2}calcium + sulfuric acid → calcium sulfate + hydrogenCa + H2​SO4​ → CaSO4​ + H2​


A metal, calcium, reacts with an acid, sulfuric acid, to produce calcium sulfate salt and hydrogen gas. 

​

​

Squeaky pop test

The squeaky pop test can be used to identify if hydrogen is produced in a reaction. A lit splint placed above a test tube and if a squeaky pop is made that confirms the formation of hydrogen.



Reactivity series 

​The more reactive the metal is the more violent the reaction.
​

Science; Acids and alkalis; KS3 Year 7; Reactions of acids with metals


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Predicting reactivity using the periodic table

Unit 1

Predicting reactivity using the periodic table

The reactivity series and metal extraction

Unit 2

The reactivity series and metal extraction

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Reactions of acids with metals

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Reactions of acids with metals

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FAQs - Frequently Asked Questions

Do different metals react differently with acid?

Different metals react differently with acid. Certain metals react very vigorously whilst others react very slowly or not at all. See the reactivity series for this information.

Is there a test which can be done to test for hydrogen?

There is a test to test for hydrogen called the squeaky pop test. This involves taking a lit splint to a test tube and if a pop can be heard then hydrogen is present.

What gas is produced when a metal and an acid are reacted together?

The gas produced when a metal and acid react together is hydrogen and it can be seen bubbling off in solution.

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