Unit 1.1 Flashcards
1
Q
What is hydrogen gas?
A
H2
2
Q
What is O2?
A
Oxygen gas
3
Q
What is nitrogen gas?
A
N2
4
Q
What is Cl2?
A
Chlorine gas
5
Q
What is F2?
A
Fluorine gas
6
Q
What is HCl?
A
Hydrochloric acid
7
Q
What is sulfuric acid?
A
H2SO4
8
Q
What is nitric acid?
A
HNO3
9
Q
What is ethanoic acid?
A
CH3CO2H
10
Q
What is methane?
A
CH4
11
Q
What is ammonia?
A
NH3
12
Q
What is SO2?
A
Sulfur dioxide
13
Q
What is CO?
A
Carbon monoxide
14
Q
What is CO2?
A
Carbon dioxide
15
Q
What is a silver ion?
A
Ag+
16
Q
What is a zinc ion?
A
Zn2+
17
Q
What is a lead iron?
A
Pb2+
18
Q
What is a hydrogen carbonate ion?
A
HCO3-
19
Q
Hydroxide ion
A
OH-
20
Q
Nitrate ion
A
NO3-
21
Q
Nitride ion
A
N³-
22
Q
Carbonate ion
A
CO3²-
23
Q
Sulphate ion
A
SO4³-
24
Q
Phosphate ion
A
PO4³-
25
What do brackets denote in formulae of molecules?
More than one of a compound
26
What is the oxidation number if an uncombined element?
Always 0
27
What is the sum of oxidation numbers in a compound?
0
28
What is the sum of oxidation numbers in an ion?
The overall charge
29
What is the oxidation number of group 1 metals?
+1
30
What is the oxidation number of group 2 metals?
+2
31
What is the oxidation number of oxygen, and what is the exception?
-2 except in fluorides
32
What is the oxidation number of hydrogen and what is the exception?
+1 except in metal hydrides
33
Which element is given the negative oxidation number?
The most electro negative element
34
When are oxidation numbers used?
In redox reactions, it shows which is reduced and which is oxidised
35
What is shown in an ionic equation?
The ions that change or react
36
What are spectators ions?
IP s that dont change or react
37
How do you write an ionic compound?
1. Write each compound as ions including state symbols
2. Remove spectator ions
3. Rewrite with remaining ions and covalent compounds
