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Reactions between Metals and Acids

In this worksheet, students will be tested on their ability to understand the reactions between Metals and Acids.

'Reactions between Metals and Acids' worksheet

Key stage:  KS 3

Curriculum topic:   Chemistry: Chemical Reactions

Curriculum subtopic:   Reactions of Acids with Metals

Difficulty level:  

Worksheet Overview

This worksheet tests a student's ability to understand the reactions between Metals and Acids.

 

First off, when an acid reacts with a metal, the acid will react with the metal to produce the metal salt of that acid; at the same time it will produce hydrogen gas.

 

What does that look like?  The general path of these metal/acid reactions is:

 

Acid + Metal  Salt + Hydrogen

 

(NB: note that the word 'salt' here refers to a metal salt, i.e. a compound of the metal which has been formed through reaction with an acid, e.g. zinc chloride, potassium nitrate and iron sulfate are all metal salts).

 

 

Example:

Here are two examples of reactions of different metals with dilute acids:

 

Zinc + Sulfuric Acid  →  Zinc Sulfate + Hydrogen

Magnesium + Hydrochloric Acid  →  Magnesium Chloride + Hydrogen
 
 
On the surface these might not seem too clear: where did the 'sulfate' or 'chloride' come from?  It might help to use compound names for these acids - after all, they are all compounds of HYDROGEN in solution.  Try this:
 
HYDROCHLORIC ACID  =  HYDROGEN CHLORIDE
SULFURIC ACID  =  HYDROGEN SULFATE
NITRIC ACID  = HYDROGEN NITRATE
 
Now look back at those two word equations above - can you see where the zinc sulfate and the magnesium chloride have come from?   Let's check out one more:
 
Copper + Nitric Acid  →  Copper Nitrate + Hydrogen  could re-written as:
 
Copper + Hydrogen nitrate  →  Copper nitrate + Hydrogen
 
Now can you see what's going on?  In all of the above reactions, the metal has TAKEN THE PLACE OF the hydrogen in the acid and formed a metal salt.  It's a type of DISPLACEMENT reaction.
 
You might like to read through all this again, think about it, then test out some of the following questions.
 
 

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