Principles of chemistry Flashcards
1
Q
What is diffusion?
A
Diffusion is the ,pavement of a substance from an area of high concentration to low concentration
2
Q
What precipitate forms when ammonia gas interacts with hcl?
A
Ammonium chloride
3
Q
Why might you use fractional distillation instead of simple distillation?
A
Simple requires substances with large boiling point differences
4
Q
What is produced when a metal reacts with water?
A
Metal hydroxide and hydrogen
5
Q
What are the two ways to prevent rusting?
A
- Barrier method-keep out water and oxygen
2. Sacrificial method-use a more reactive metal to be oxidised
