Table 1: Preparation of NaCl(aq) Solution
mass of NaCl(s)
4.1682 g
volume of total solution (mL)
100 mL
appearance of NaCl(s)
white powdery
appearance of NaCl(aq)
transparent
Table 2: Measurement of Mass and Volume of 2.00 mL Aliquots of NaCl(aq) from Graduate Pipet
Trail
Volume of aliquot added
(mL)
Mass of empty
Erlenmeyer (g)
Total Mass of
Erlenmeyer and
NaCl(aq)
(g)
1
1.99 mL
50.2438 g
52.0941 g
2
1.98 mL
50.3225 g
52.1769 g
3
1.95 mL
50.2566 g
52.0711 g
4
2.01 mL
50.2511 g
52.1674 g
Table 3: Measurement of Mass and Volume of NaCl(aq) Aliquots from Buret
Initial Buret Readings
(mL)
Final Buret Reading
(mL)
Mass empty Erlenmeyer
(g)
Mass
Erlenmeyer+NaCl
(aq)
(g)
0.20 mL
2.20 mL
50.3026 g
52.1959 g
2.20 mL
7.25 mL
50.2619 g
55.4371 g
7.25 mL
17.45 mL
50.2424 g
60.6968 g
Table 4: Preparation of Red Dye Solutions and Absorbance Measurements
stock concentration of dye
solution (M)
3.15x10-5 M
appearance of red dye
solution
Red
total diluted volume of each
solution
100 mL
wavelength monitored (nm)
516.4 nm
Solution
volume stock solution
transferred
(mL)
Appearance of Solution
Absorbance
A
100.0 mL
intense red
0.774
B
10.0 mL
light red
0.127
C
20.0 mL
red
0.232
D
30.0 mL
dark red
0.341
E
40.0 mL
very dark red
0.433
grams\,of\,NaCl\,need\,for\,0.70M\,of\,100mL=\frac{0.70mol}{L}\frac{1L}{1000mL}\frac{100mL}{}\
frac{58.44g}{1mol\,NaCl}\\=4.1g
standard\,deviation=\sqrt{\frac{(0.930-0.938)^2+(0.937-0.938)^2+(0.931-0.938)^2+(0.953-0.938)
^2}{4-1}}
Table 5. Density of NaCl(aq) from 2.00mL Aliquot Measurements
Trial
Volume of aliquot added
(mL)
Mass of NaCl(aq)
(g)
Density of NaCl(aq)
(g/mL)
1
1.99
1.8503
0.930
2
1.98
1.8544
0.937
3
1.95
1.8145
0.931
4
2.01
1.9163
0.953
Table 6: Statistical Analysis of Density Data
Average Density(g/mL)
0.938
Standard Deviation of Density (g/mL)
0.0110
% Standard Deviation of Density (%)
1.10%
Table 7: True Volume Delivered by Buret
Volume of NaCl(aq) from
buret readings
(mL)
Mass of NaCl(aq)
(g)
True volume of
NaCl(aq)
(mL)
%Error in Volume
2.00
1.8933
2.02
-0.96%
5.05
5.1752
5.52
-8.51%
10.20
10.4544
11.15
-8.52%
Table 8: Beer's Law Plot for Dye Solution
Solution
Molarity of Dye Solution
(M)
Absorbance at _____ nm
A
3.150E-05
0.774
B
3.15E-06
0.127
C
6.30E-06
0.232
D
9.45E-06
0.341
E
1.26E-05
0.433