- Need Help With Questions 1 2 3 4 Urgently Please Help Thank You Table 1 Concentration Of Species Mol L Flask 1 (5.58 KiB) Viewed 10 times
Concentration of Species (mol/L)
Flask
Vol. of HCl (mL)
Co(H2O)62+
Cl-
CoCl42-
Colour
Keqm
A
0
0.97
1.9
0.033
Light red
0.026
B
10
0.81
2.5
0.095
Slight darker reddish purple
0.0025
C
20
0.67
3.0
0.16
Light burgundy purple
0.0029
D
30
0.55
3.4
0.22
Light greyish purple
0.0029
E
40
0.45
3.8
0.27
Greyish purple
0.0029
Table 2
Concentration of Species (mol/L)
Flask
Vol. ofAgNO3 (mL)
Co(H2O)62+
Cl-
CoCl42-
Colour
Keqm Constant
F
25
0.80
0.40
0.000058
Red
0.0028
D
50
0.55
1.4
0.0064
Red (slight bit darker + grey)
0.0030
E
50
0.51
1.9
0.020
Darker greyish red
0.0030
1. Compare the equilibrium constant for experiments involvingthe addition of HCl with those involving AgNO3. Are theythe same? Should they be? Explain.
2. Consider Flask B. Sketch a graph showing (very roughly – i.e.higher or lower) the relative equilibrium concentrations of the 2complex ions and the chloride ion against time before and after theaddition of HCl.
3. Consider Flask F. Sketch a graph showing (very roughly – i.e.higher or lower) the relative equilibrium concentrations of the 2complex ions and the chloride ion before and after the addition ofAgNO3.
4. Consider Flask E. Sketch a graph showing (very roughly – i.e.higher or lower) the relative equilibrium concentrations of the 2complex ions and the chloride ion from the very beginning of theexperiment when the system is in equilibrium before the addition ofHCl until equilibrium is regained after the addition ofAgNO3.
2+ Co(H,O)}+4CI → CoCl² + 6H₂O.