💧 3. Water and Pure Substances Flashcards
(5 cards)
1
Q
What is a pure substance?
A
A substance made up of only one type of particle.
2
Q
Is seawater pure or impure? and why
A
Impure it contains salt and other substances.
3
Q
What is the boiling point of pure water?
A
100°C.
4
Q
How can you test for water?
A
Use anhydrous copper(II) sulfate – it turns from white to blue.
5
Q
Why is distilled water considered pure?
A
Because it contains only water molecules and no dissolved salts or impurities.
