Acids & Alkalis Flashcards
1
Q
What are alkalis like?
A
Destroy grease, caustic
2
Q
What colour do acids turn in litmus paper?
A
Red
3
Q
What colour do alkalis turn litmus paper?
A
Blue
4
Q
What numbers on the pH scale are strong acids?
A
0, 1, 2
5
Q
What numbers on the pH scales are weak acids?
A
3, 4, 5, 6
6
Q
What number is neutral on the pH scale?
A
7
7
Q
What number on the pH scale is a weak acid?
A
8, 9, 10
8
Q
What number is a strong alkali on the pH scale?
A
11, 12, 13, 14
9
Q
How can we know if something is acid or alkali (indictors)
A
Litmus paper, universal indicator, skin test, taste
10
Q
How do you make universal indicator?
A
Grind red cabbage with a mortal and pestle to let the juice out
11
Q
What are acids like?
A
They taste sour, damage cells, react with metals
12
Q
What is the difference between an alkali and a base
A
Alkalis are soluble base
