One student calibrated a 50-mL burette by using the mass of water delivered. The student used an analytical balance which was previously calibrated by STEEL (density = 7.8 g/mL). During calibration, the temperature of water was found to be 19.0oC. The density of water at this temperature is 0.9984 g/mL. The results of the calibration by the student is shown in the table below: Apparent burette reading, mL A-10.05 ml, B- 20.04ml, C- 30.08ml, D- 40.07 ml, E- 49.98ml Weight H2O delivered, g A -10.03g, B- 20.09g, C- 30.05g, D- 40.02g, E- 49.83g 35. What is the true mass of water delivered in A? A) 10.03 B) 10.04 C) 10.05 D) 10.06 E) 10.07
One student calibrated a 50-mL burette by using the mass of water delivered. The student used an analytical balance which was previously calibrated
by STEEL (density = 7.8 g/mL). During calibration, the temperature of water was found to be 19.0oC. The density of water at this temperature is
0.9984 g/mL. The results of the calibration by the student is shown in the table below:
Apparent burette reading, mL
A-10.05 ml, B- 20.04ml, C- 30.08ml, D- 40.07 ml, E- 49.98ml
Weight H2O delivered, g
A -10.03g, B- 20.09g, C- 30.05g, D- 40.02g, E- 49.83g
35. What is the true mass of water delivered in A?
A) 10.03
B) 10.04
C) 10.05
D) 10.06
E) 10.07
36. What is the true mass of water delivered in B?
A) 20.12
B) 20.13
C) 20.14
D) 20.15
E) 20.16
37. What is the true mass of water delivered in C?
A) 30.13
B) 30.11
C) 30.10
D) 30.09
E) 30.08
38. What is the true mass of water delivered in D?
A) 40.09
B) 40.08
C) 40.07
D) 40.06
E) 40.05
39. What is the true volume of water delivered in A?
A) 10.00
B) 10.02
C) 10.04
D) 10.06
E) 10.08
40. What is the true volume of water delivered in B?
A) 20.12
B) 20.14
C) 20.16
D) 20.18
E) 20.20
41. What is the true volume of water delivered in D?
A) 40.11
B) 40.12
C) 40.13
D) 40.14
E) 40.15
42. What is the true volume of water delivered in E?
A) 50.00
B) 49.98
C) 49.96
D) 49.94
E) 49.92
43. What is the correction volume of water delivered in C?
A) 0.04
B) 0.08
C) 0.00
D) -0.04
E) -0.08
44. What is the true volume of water delivered in D?
A) 0.11
B) 0.12
C) 0.13
D) 0.14
E) 0.15
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