Electrolysis Flashcards
A lithium ion, Li+, has two electrons. How can you turn it back into an atom?
If it gains 1 electron
To balance a + you have to?
Gain electrons
To balance a - you have to?
Lose electrons
How does the Br- ion become an atom.
By losing one electron
Oxidation takes place at the?
Anode
Reduction takes place at the?
Cathode
Ions of low reactivity are discharged instead of?
H+
H+ is discharged instead of?
High reactivity metals
Halide ions are discharged instead of?
OH- ions
OH- ions are discharged instead of?
Other negative ions
These negative ions include.
NO3- SO42- CO32-
When in a solution, all ions will contain?
OH- and H+
Only thing that make solutions acidic is?
H+
Only thing that makes solutions alkaline is?
OH-
Explain test for hydrogen?
The squeaky pop test. Put a lit splint at the end of the test tube and listen for a squeaky pop.
Explain test for oxygen.
Put a blown out splint into a test tube, if it relights then there is oxygen produced.
Methyl orange goes which colours in acid and in alkali?
It goes red in acid and yellow in alkali
What colours does phenophalein go in acid and alkali?
It goes colourless in acid and pink in alkali.
What piece of apparatus should be used to measure acid for titration?
Glass pipette
What is the nam given to the method for finding the amount of acid needed to neutralise the solution?
Titration
If you add litmus paper to chlorine it goes?
Red and then it bleaches white.
What is electrolysis?
Electrolysis is the breaking down of a substance using electricity.
What is oxidation in terms of electrons?
Loss of electrons
What is reduction in terms of electrons?
Gain of electrons
