Chem lab final Flashcards
(40 cards)
1
Q
AgCl
A
White ppt
2
Q
PbCrO4
A
Yellow ppt
3
Q
PbSO4
A
White ppt
4
Q
CdS
A
Yellow ppt
5
Q
Na3Co(CO3)3
A
Green color
6
Q
Ni(C4H7O2N2)2
A
Red ppt
7
Q
Al(OH)3
A
Red ppt
8
Q
BaCrO4
A
Yellow ppt
9
Q
Ba^2+
A
Green flame test
10
Q
CaC2O4
A
White ppt
11
Q
Ca^2+
A
Red flame test
12
Q
Na^+
A
Yellow flame test
13
Q
Test NH3 for presence of NH4^+ by
A
Smell and red litmus paper
14
Q
K^+
A
Violet flame test
15
Q
endothermic
A
energy + reactants → products
16
Q
exothermic
A
reactants → products + energy
17
Q
Le Chatelier’s principle
A
If an equilibrium is stressed, then the reaction shifts to reduce the stress
18
Q
Dilution equation
A
MiVi= MfVf
19
Q
pH
A
pH = -log[H+]
20
Q
Mole fraction
A
Xsolute = mol of solute / total mol
Xsolvent = mol of solvent / total mol
Xsolute + Xsolvent = 1
21
Q
Group 2 cations pH
A
pH range of 0.5 ±0.3
22
Q
Group 3 cations pH
A
pH between 8-10
23
Q
Group 4 cations pH
A
pH at ~5
24
Q
Group 1 cations reagents
A
Ag+, Pb2+
25
Group 2 cations reagents
Pb2+, Cu2+, Cd2+
26
Group 3 cations reagents
Ni2+, Fe3+, Al3+, Co2+
27
Group 4 cations reagents
Ba2+, Ca2+
28
Group 5 cations reagents
NH4+, K+, Na+
29
Addition of base
Shifts left
30
Addition of acid
Shifts right
31
Addition of more product
Shifts left
32
Addition of more reactant
Shifts right
33
Increase in the temperature (exothermic)
Shifts left
34
Increase in the temperature (endothermic)
Shifts right
35
Complete the net ionic equation:
Pb^2+(aq) + CrO4^2-(aq) ---->
Pb^2+(aq) + CrO4^2-(aq) ---->PbCrO4
36
Complete the net ionic equation:
AgCl(s) + NH3(aq) ----->
AgCl(s) + NH3(aq) -----> (AgNH3)2^+(aq) + Cl^-(aq)
37
Ksp equation
Ksp=[C]c[D]d
38
Kc equation
Kc = -[C]c[D]d / [A]a[B]b
39
Ammonia
NH3
40
Ammonium cation
NH4^+
