Acids And Bases Flashcards
1
Q
What is an indicator
A
A dye that changes colour depending on whether it is above or below a certain pH
2
Q
What are wide range indicators
A
Contain mixture of dyes that gradually change colour over a broad range of pH
Useful for estimating the pH of a substance
3
Q
What ions does acid form in water
A
H+
4
Q
What is a base
A
Substance with a pH over 7
5
Q
What are alkalis
A
A base that dissolves in water to form a substance with a pH greater than 7
6
Q
What ions do alkalis form in water
A
OH-
7
Q
What is a neutralisation equation
A
Acid + base -> salt + water
H+ + OH- -> H2O
