Chemistry- Acids And Bases Flashcards
1
Q
What is the pH scale
A
It is the measure of how acidic or alkaline a solution is
2
Q
What is the pH range of an Acid
A
pH1-pH6
3
Q
What is the pH range for a neutral substance
A
pH7
4
Q
What is the pH range for an Alkaline
A
pH8-14
5
Q
The higher the concentration of hydrogen ions…..
A
The more acidic it is, therefore the lower the pH
6
Q
What is a base
A
A substance that reacts with acids to make salt + water
7
Q
What is an alkali
A
A base that is soluble in water
8
Q
What do alkalis produce in water
A
Hydroxide ions (OH-)
9
Q
How do you measure the pH of a solution
A
An indicator called ‘universal indicator’ turns the color of the pH level
- acid is red/orange
- neutral is green
- alkali is purple/blue
10
Q
What is the reaction between a base and water called
A
Neutralisation reaction
