Extra Stuff To Know Flashcards
1
Q
Which brackets should you use for kp?
A
Rounded
2
Q
Which brackets should you use for kc?
A
Square
3
Q
How do you work out what molecule has the greatest lattice enthalpy of dissociation base on structure?
A
E.g K+ ion is bigger than Na+ ion
Therefore there is a weaker electrostatic attraction between oppositely charged ions in K+
4
Q
Why use a Burnett instead of pipettes?
A
Can deliver variable volumes
5
Q
How do you extract titanium?
A
It’s expensive Add chlorine to stop it forming titanium chloride Uses mg to extract Ti02 + 2cl2 + 2c to ticl4 + 2co Ticl4 + 2Mg to 2mgCl2 + Ti
6
Q
How does aluminium oxide and sodium hydroxide react?
A
Al203 + 2Na0H + 3H20 to 2NaAl(OH)4
7
Q
How does aluminium oxide react with h2so4?
A
Al203 + 3H2S04 to Al2(S04)3 + 3H20
8
Q
How does aluminium react with HCl?
A
Al203 + 6HCl to 2AlCl3 + 3 H20
9
Q
What are the equations for the hydrogen oxygen fuel cell?
A
H2 to 2H+ + 2e- oxidation
O2 + 4H+ + 4e- to 2H20 reduction
