Unit 3 iv) Properties Of Metals Flashcards
What is metallic bonding?
The strong force of attraction between positively charged ions and delocalised electrons
What does a metal and acid produce?
Salt and Hydrogen
What does a metal and water produce?
Metal Hydroxide and Hydrogen
What metals in the ECS do not react with water?
Metals below magnesium
What does a metal and oxygen produce?
Metal Oxide
What metals in the ECS do not react with oxygen?
Metals below copper which are Mercury
Silver
Gold
What is the test for hydrogen?
It burns with a pop
Define OILRIG
Oxidation Is Loss Reduction Is Gain
Where are most metals obtained from?
Metal ores
What is an alloy?
A mixture of 2 or mole elements where at least one is a metal
What are the 3 ways to extract a metal from its ore?
- Heating Alone
- Heating with Carbon
- Electrolysis
What does finite mean?
It will run out
What is the test for oxygen?
Relights a glowing splint
What kind of reactions are extractions of metals?
Reduction
What are reducing agents?
Substances that help to reduce the metal ions during extraction from their ores
What is the equation for extraction by heat alone?
Metal oxide –> Metal + Oxygen
What is the equation for extraction by heating with carbon/carbon monoxide?
Metal oxide + carbon –> metal + carbon dioxide
What is the equation for extraction by electrolysis?
Metal ion + electrons –> Metal
When does a displacement reaction occur?
When a metal higher in the ECS pushes out a metal lower in the ECS
What is corrosion?
An oxidation reaction where an element reacts and forms a compound
What is the corrosion of iron?
Rusting
What is the chemical test for rust?
Ferroxyl indicator
What colour does the indicator turn if rust is present?
Blue
What colour does ferroxyl indicator turn in the presence of OH- ions?
Pink
