Properties Of Metals Flashcards
Why can metals conduct electricity
The electrons are free to move
What is the word equation for metals reacting with water
Metal+water makes metal hydroxide+hydrogen
What is the word equation for the reaction of metal with acid
Metal + acid -> salt + hydrogen
What is the word equation for the reaction is a metal with oxygen
Metal + oxygen —> metal oxide
Where are the cut off points in the reactivity series
Calcium
Lead
Copper
Gold
Describe the structure of a metallic bond
the positive ions are tightly packed in a regular pattern amongst a sea of delocalised electrons
Describe the movement of electrons in an electrochemical cell
Electrons flow from the metal which is higher in the electrochemical series, through the wires, through the voltmeter, and to the metal which is Lower in the series
Describe the set up of a cell made from two half cells
Two beakers, connected by an ion bridge and a different metal in each dipped in a solution of its own ions. Each metal attached to a voltmeter.
What is the purpose of an ion bridge
To complete the circuit
What are the chemical reactions in cells called
Displacement reactions
How can cells be made with only one metal
Have a reactive metal in one cell, and another substance in the other cell which will accept electrons, and an ion bridge to complete the circuit
When does a displacement reaction occur
When a metal from the electrochemical series is mixed with an ion of a metal lower down in the series
What is a redox reaction
A reaction where both reduction (gain of electrons) and oxidation (loss of electrons) take place
How can metals be removed from their ores
Heated, heated with carbon, or electrolysed
