Module 2 - Acids
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When an acid is added to water what ion is released into the solution?
Hydrogen ion , H+
Define acid
Proton donor
Describe the dissociation of a strong acid
Full dissociation
Define base
Proton acceptor
Which base is used to treat acid indigestion?
Magnesium hydroxide
What are alkalis?
Bases that can dissolve in water to form aqueous hydroxide ions
What are amphoteric substances?
Substances that can act as acids and bases
What is formed when acid reacts with carbonate?
Salt, carbon dioxide and water
What is a salt?
A compound that is formed when H+ of an ion is replaced by a metal ion or positive ion
What is formed when acids react with metal oxide?
Salt and water
What is formed when acid reacts with alkali?
Salt and water
What is formed when acids react with metal?
Salt and hydrogen
Why are the products same when acid reacts with alkali or metal oxides?
Both alkali and metal oxides are types of bases
How are ammonium salts formed?
When acid reacts with aqueous ammonia
What are hydrated crystals?
A crystalline structure containing water
What does anhydrous crystals mean?
Crystalline form that contains no water
What does a dot formula indicate?
The amount of water present in a crystalline structure
Write down the methods to carry out a titration
• Using a pipette, measure the volume of a solution • Add the base into a conical flask and add an indicator into it • Add the acid solution into a burette and record the volume • Slowly add the solution in the burette into the conical flask • Swirl the mixture continuously until the end point is reached • Repeat until concordant results are obtained
What is the colour of methyl orange in an acid, base and at end point?
● Acid - red ● Base - yellow ● End point - orange