Acids and Alkalis Flashcards
1
Q
What is the pH scale?
A
A measure of how acid or alkali something is, goes from 0 to 14 (0 = strongest acid, 7 = neutral, 14 = strongest alkali)
2
Q
What is an indicator?
A
A dye that changes colour to show pH, e.g. universal indicator.
3
Q
What is a base?
A
A substance with a pH higher than 7.
4
Q
What is the reaction for neutralisation?
A
acid + base —> salt + water
5
Q
What are the state symbols? (4 points)
A
(s) = solid
(l) = liquid
(g) = gas
(aq) = dissolved in water
