C6 Electrolysis Flashcards
1
Q
Nitinol is an alloy used in dental braces.
Why is Nitinol used in dental braces?
A
It can return back to its original shape
Is a shape memory alloy
2
Q
Give two reasons why instrumental methods of analysis are used to detect impurities in
metals.
A
- They’re rapid
- ## They’re accurate
3
Q
What is the half equation for when an OH- ion is discharged at the anode?
A
4OH- → 2H2O + O2 + 4e-
4
Q
Why is molten aluminium oxide dissolved in molten cryolite?
A
- Lowers the melting point of Aluminium oxide
(so the mixture is molten at lower temperatures)
[lowers running costs]
5
Q
Universal indicator was placed in the solution of an electrolysis of NaCl solution. Explain why the solution turned blue
A
- The solution turns alkaline because one of the products is sodium
hydroxide - Or (hydroxide ions are produced)
