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 waterat 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 B = 20.04 C = 30.08 D = 40.07 E = 49.98
Weight H2O delivered, g
A = 10.03 B = 20.09 C = 30.05 D = 40.02 E = 49.83
1. What is the correction volume of water delivered in C?
2. What is the correction volume of water delivered in D?
This question has been asked several times. I am not sure, because of some of the language, what procedure to use. If you could help by explaining where you are in the class and what you are studying it might help.
To find the correction volume of water delivered in C and D, we need to calculate the actual volume of water delivered.
To calculate the actual volume of water delivered, we will use the mass of water delivered and the density of water at 19.0°C.
1. Calculation for the correction volume of water delivered in C:
Step 1: Calculate the mass of water delivered in grams for point C:
Mass of water delivered in C = 30.05 g
Step 2: Calculate the actual volume of water delivered in C:
Actual volume = Mass of water delivered / Density of water at 19.0°C
= 30.05 g / 0.9984 g/mL
Step 3: Calculate the correction volume in C:
Correction volume = Apparent volume - Actual volume
= 30.08 mL - (30.05 g / 0.9984 g/mL)
2. Calculation for the correction volume of water delivered in D:
Step 1: Calculate the mass of water delivered in grams for point D:
Mass of water delivered in D = 40.02 g
Step 2: Calculate the actual volume of water delivered in D:
Actual volume = Mass of water delivered / Density of water at 19.0°C
= 40.02 g / 0.9984 g/mL
Step 3: Calculate the correction volume in D:
Correction volume = Apparent volume - Actual volume
= 40.07 mL - (40.02 g / 0.9984 g/mL)
By following these steps, you can calculate the correction volume of water delivered in C and D.