Extracting metals and equilibria Flashcards
What do the most reactive metals react with
Water
What is the equation for a metal + water
Metal + Water » metal hydroxide + hydrogen
What do fairly reactive metals react with
Acids
What is the equation of metal + acid
Metal + acid » salt + hydrogen
What do all metals react with
Oxygen
What is the equation for metal + oxygen
Metal + oxygen » metal oxide
What is the only metal that doesn’t react with water, acid or oxygen
gold
What are displacement reactions
When a more reactive metal displaces the less reactive metal causing it to be left uncombined
Explain the displacement reactions as redox reactions
- More reactive metals form a cation losing electrons and being oxidised
- Less reactive metals from anions gaining electrons when displaced being reduced
What is reactivity
The tendency of the metal atom to form cations
What are the three elements that react with water
Potassium
Sodium
Calcium
What elements react with dilute acid
Magnesium, Aluminium, Zinc, Iron
What elements are least reactive
Copper, Silver, Gold
Where are most metals found
In the earth’s crust
-Most metals found as ores
-Unreactive metals found uncombined
What is oxidation (when relating to oxygen)
The gain of oxygen