Lsn3️⃣ Flashcards
(13 cards)
1
Q
- What are colorful chemicals that change color with acids or alkalis called?
A
Indicators
2
Q
- What does litmus turn when mixed with acids?
A
Red
3
Q
- What color does litmus become with an alkali?
A
Blue
4
Q
- Where can we get colored dyes from?
A
Flowers and fruits
5
Q
- What is the universal indicator solution a mixture of?
A
Different coloured chemicals
6
Q
What type of chemical is copper oxide
A
Base
7
Q
Acid + base or alkali=
A
Salt + water
8
Q
Sulphuric acid + copper oxide=
A
Copper sulfate + water
9
Q
What is an indicator
A
A chemical that gives a colour change in acidic, alkaline and neutral solutions
10
Q
What is base
A
A substance that reacts with an acid producing a salt and water
11
Q
What is an alkali
A
A soluble base
12
Q
What is neutralisation?
A
The reaction between an acid and an alkali producing a salt and water
13
Q
What is salt?
A
A compound formed when some or all of the hydrogen Ions in an acid are replaced by metal, ions or ammonium ions
