7c. Acids and Bases Flashcards
What are some uses of acids in food industry
- flavourings
- preservatives
What are the 3 common lab acids?
Hydrochloric
Sulphuric
Nitric
What is the acidic ion?
The H+ (aq) ion
Definition of an acid
A solution with higher numbers of hydrogen (H+) ions than hydroxide (OH-) ions
What is the alkali ion?
The OH- (aq) ion
What makes solutions alkaline?
Higher numbers of hydroxide ions that hydrogen ions
What are the salts that form from 3 lab acids?
Definition of a “salt”
When the hydrogen ions of an acid are replaced by +ve metal ions
Definition of a “base”
A substance that neutralises an acid
What are the 3 categories of bases?
Metal oxides
Metal carbonates
Metal hydroxides
What are the products when metal oxides react with acids?
A salt plus water
What is the reaction that happens when oxides react with acids?
Describe the metal oxides and acids experiment.
Acid is heated to increase reaction rate
Excess oxide is removed by filtration
What are the products when metal carbonates react with acids?
A salt plus carbon dioxide plus water
What is the reaction when carbonates react with acids?
Describe a filtration apparatus
What are the products when metal hydroxides react with water
A salt plus water
