exam 2 Flashcards
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1
Q
Avogadro’s number and use
A
6.022 x 10^23 atoms / 1 mol
Used to find number of atoms
2
Q
Diatomic molecules and definition
A
Diatomic - consisting of two atoms
Br,I,N,Cl,H,O,F
3
Q
Hg2^2+
A
Mercury(I)
4
Q
NH4^+
A
Ammonium
5
Q
NO2^-
A
Nitrite
6
Q
NO3^-
A
Nitrate
7
Q
SO3^2-
A
Sulfite
8
Q
SO4^2-
A
Sulfate
9
Q
HSO4^-
A
Hydrogen sulfate
10
Q
OH^-
A
Hydroxide
11
Q
CN^-
A
Cyanide
12
Q
PO4^3-
A
Phosphate
13
Q
HPO4^2-
A
Hydrogen phosphate
14
Q
H2PO4^-
A
Dihydrogen phosphate
15
Q
NCS^- or SCN^-
A
Thiocyanate
16
Q
CO3^2-
A
Carbonate
17
Q
HCO3^-
A
Hydrogen carbonate
18
Q
ClO^- or OCL^-
A
Hypochlorite
19
Q
ClO2^-
A
Chlorite
20
Q
Clo3^-
A
Chlorate
21
Q
ClO4^-
A
Perchlorate
22
Q
C2H3O2^-
A
Acetate
23
Q
MnO4^-
A
Permanganate
24
Q
Cr2O2^2-
A
Dichromate
25
CrO4^2-
Chromate
26
O2^2-
Peroxide
27
C2O4^2-
Oxalate
28
S203^2-
Thiosulfate
29
First rule for solubility - nitrates
All nitrates are soluble. (NO3^- salts)
30
Second rule for solubility - salts containing ? are soluble
All salts containing Li+, Na+, K+, Rb+, Ca+, NH4+ as a cation are soluble.
31
Third rule for solubility - salts are soluble unless...
Most Cl-, Br-, I- salts are soluble unless the cation is Pb2+, Ag+, Hg2+
32
Fourth rule for solubility - sulfate salts are soluble except...
Most sulfate salts are soluble. Notable exceptions are BaSO4, PbSO4, and CaSO4.
33
Fifth rule for solubility - hydroxides are insoluble except...
Most hydroxides are insoluble except LiOH, NaOH, KOH, CaOH.
34
Sixth rule for solubility - ? salts are slightly soluble except
Most sulfide (S2-), carbonate (CO3^2-), chromate (CrO4^2-), and phosphate (PO4^3-) salts are only slightly soluble, except those containing Li+, Na+, K+, Rb+, Ca+, NH4+.
35
Molarity definiton and example
Molarity - a measure of concentration.
| mol/L=M (mole over liter equals molar)
