Electrochemistry Details Flashcards
Solids that conduct
Metals and graphite
(In terms of conductivity)Molecular substances are…
non-conductors
Conditions for solid ionic substances to conduct(they usually don’t)
Must be melted/dissolved in water
Product of electrolysis at the anode(molten ionic compound)
A non-metal
Product of electrolysis at the cathode(aqueous solutions)
A metal or hydrogen
Product of electrolysis at the anode(aqueous solutions)
A halide or oxygen
Reactivity series(descending order)
-Potassium
-Sodium
-Calcium
-Magnesium
-Aluminium
-Zinc
-Iron
-Lead
-Hydrogen
-Copper
-Silver
Condition which decides whether a metal or hydrogen forms at the anode(aqueous solution)
-If the metal is less reactive than hydrogen, a metal forms
-If the metal is more reactive than hydrogen, hydrogen forms
Condition which decides whether a halide or oxygen forms(aqueous solution)
-If it is a concentrated solution of a halide, then the halide forms
-If the halide solution is dilute, oxygen forms
-If there is no halide, oxygen forms
Where reduction takes place
At the cathode
Where oxidisation takes place
At the anode
(Using copper electrodes) From which electrode to which does the copper move(with copper(II) sulfate as the electrolyte)
From the anode to the cathode
When electroplating, at which electrode do you put the object that you want to electroplate?
The cathode
Electrolysis
the decomposition of an ionic compound, when molten or in aqueous solution, by the passage of an electric current
