Energy Changes and Acids and Alkalis Flashcards
What is the pH scale
A continuous range of numbers which indicate the acidity and alkalinity of a solution
Where are acids in the pH scale
Less than 7
Where are alkalis on the pH scale
More than 7
Where is neutral solutions and pure water on the pH scale
Equal to 7
What happens when an acid is diluted
Become less acidic and it’s pH increases towards 7
What happens when an alkali is diluted
Become less alkaline and it’s pH increases towards 7
Do acids and alkalis able to conduct electricity
Yes because they’re ionic
How are salts named
From the acid and alkali used in the reaction
What is always made in the neutralisation of an acid and metal oxide
A salt and water
What is a base
Any substance that will neutralise an acid
What can a base be
An alkali, metal oxide, metal carbonate or ammonia
What is a spectator ion
An ion that exists as a reactant and a product in a chemical equation
Where does a titration have to be used
To make a salt
What is used in one test in a titration
Indicator soecies
