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Module 2.1.4 - Acids

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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#1
Front (Question)

What is an acid?

Back (Answer)

A proton (H+) donor

#2
Front (Question)

What is the chemical formulae of hydrochloric acid?

Back (Answer)

HCl (aq)

#3
Front (Question)

What is the chemical formulae of sulfuric acid?

Back (Answer)

H2SO4 (aq)

#4
Front (Question)

What is the chemical formulae of nitric acid?

Back (Answer)

HNO3 (aq)

#5
Front (Question)

What is the chemical formulae of phosphoric acid?

Back (Answer)

H3PO4 (aq)

#6
Front (Question)

What is the chemical formulae of ethanoic acid?

Back (Answer)

CH3COOH (aq)

#7
Front (Question)

What does an acid release in aqueous solution?

Back (Answer)

Hydrogen ions (H+)

#8
Front (Question)

What is a strong acid?

Back (Answer)

A strong acid completely dissociates into its ions in aqueous solution

#9
Front (Question)

What is a weak acid?

Back (Answer)

A weak acid partially dissociates into its ions in aqueous solution

#10
Front (Question)

How is a weak acid shown in an equation?

Back (Answer)

A reversible reaction arrow

#11
Front (Question)

What are examples of strong acids?

Back (Answer)

• Hydrochloric acid • Nitric acid • Sulfuric acid • Phosphoric acid

#12
Front (Question)

What is an example of a weak acid?

Back (Answer)

Ethanoic acid, only releases a small proportion of it’s available hydrogen atoms into solution at H+ ions

#13
Front (Question)

What happens to sulfuric acid when mixed with water?

Back (Answer)

• Each H2SO4 molecule dissolves, releasing just one of its hydrogen atoms as an H+ ion • The resulting HSO4- (aq) ions then only partially dissociate

#14
Front (Question)

What is a base?

Back (Answer)

A proton (H+) acceptor

#15
Front (Question)

What are common bases?

Back (Answer)

• Metal oxide • Metal hydroxide • Carbonate • Ammonia solution

#16
Front (Question)

Which of the common base types is a weak base?

Back (Answer)

Ammonia

#17
Front (Question)

What are salts?

Back (Answer)

A salt is produced when the H+ ion of an acid is replaced by a metal ion or NH4+

#18
Front (Question)

What are all salts made from?

Back (Answer)

Acids, salt name comes from acid used

#19
Front (Question)

What does a metal oxide and acid produce with its ionic equation and what is observed?

Back (Answer)

• Salt and water • O2- + 2H+ -> H2O neutralisation reaction • Solid dissolves

#20
Front (Question)

What does a metal hydroxide and acid produce with its ionic equation and what is observed?

Back (Answer)

• Salt and water • OH- + H+ -> H2O neutralisation reaction • no visible change

#21
Front (Question)

What does a carbonate and acid produce with its ionic equation and what is observed?

Back (Answer)

• Salt + water + carbon dioxide • CO3 2- + 2H+ -> H2O + CO2 neutralisation reaction • solid dissolves and bubbles of gas

#22
Front (Question)

What is produced when ammonia and acid react with its ionic equation and what is observed?

Back (Answer)

• Ammonium salt produced • NH3 + H+ -> NH4 + neutralisation reaction • no visible change

#23
Front (Question)

What is produced when a metal and acid react and what is observed?

Back (Answer)

• Salt and hydrogen a redox reaction, not neutralisation • solid dissolves and bubbles of gas

#24
Front (Question)

What is an alkali?

Back (Answer)

A base that dissolves in water and releases OH- ions in aqueous solution