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58 SCIPAD - BIG IDEAS - BOOK 2
BASIS OF CHEMICAL REACTIONS
End of Chapter Review Questions
1. Match the term to its definition.
Acid • • A measure of how acidic or basic a solution is.
Base • • Release hydrogen ions when dissolved in water.
Alkali • • A base that is soluble in water.
Neutralisation • • Changes colour depending on the pH of a
solution/substance.
pH • •
Describes the reaction between an acid and a
base.
Indicator • • A substance that can neutralise an acid.
2. Complete the following chemical word equation:
Acid + base 
3. Define the following terms:
(a) Concentrated acid: 


(b) Dilute alkali: 


4. (a) Name the weak acid found in lemons.
		
(b) State the colour universal indicator would turn when added to lemon juice.
		
5. (a) Soaps are weakly basic. Suggest what the pH of a liquid hand soap could be.
		
(b) State the colour universal indicator would turn when added to hand soap.
		
6. Name 3 minerals acids found in most school laboratories.
(a) 
(b) 
(c) 
7. Delete the incorrect terms in the sentence below:
“When a base is added to an acidic solution the pH will increase / decrease. If the solution
had Universal indicator in it, and it turned green, this would show that the solution has
become acidic / basic / neutral. The pH at this point would be 6 / 7 / 8.“
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