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7.2 Making Salts
What is made when acids and metals react?
What is made when alkalis and metals react?
19 April 2023
Bonneville salt flats in America. A dried up salt water lake where some land speed records have been set.
7.2 Making Salts
• When acids react with a base a neutralisation reaction occurs.
• It produces a salt and water.• Metal + acid also makes a salt and
releases hydrogen gas.
19 April 2023
This volcanic lake in New Zealand contains Hydrochloric Acid! pH1.
Bases can be added to lakes affected by acid rain to neutralise them.
Acids + Metals
Metal + Acid metal salt + HydrogenMg(s) + 2HCl(aq) MgCl2(aq) + H2(g)
Magnesium + Hydrochloric Acid Magnesium Chloride + Hydrogen
Hydrochloric acid forms a Chloride salt
Sulfuric acid forms a Sulfate salt
Nitric acid forms a Nitrate salt.
1. Nitric acid + Copper __________ + _______
2. Sulfuric acid + Sodium ________ + ________
Acid + Insoluble Base
Acid + Base salt + water6HCl(aq) + Fe2O3(s) 2FeCl3(aq) + 3H2O(l)
Hydrochloric Acid + Iron (III) Oxide Iron (III) Chloride + water
Where does the water come from?
What salt is made when sulfuric acid is added to zinc oxide?
Practical1. Add copper oxide to sulfuric acid.
Warm gently on a Bunsen. DO NOT BOIL – Poisonous gases!
2. Filter to remove excess copper oxide.
3. Evaporate to remove water.
Write out a word equation to show the reaction.
What do the copper sulphate crystals look like?Page 199 Summary
questions
7.2 Making Salts
• When acids react with a base a neutralisation reaction occurs.
• It produces a salt and water.• Metal + acid also makes a salt and
releases hydrogen gas.
19 April 2023
This volcanic lake in New Zealand contains Hydrochloric Acid! pH1.
Bases can be added to lakes affected by acid rain to neutralise them.