(1) In the procedure, one step is to calibrate the volume of the flask you will...
(1) In the procedure, one step is to calibrate the volume of the flask you will use for the density determination. How is this done?
- The temperature of the water is measured.
- The mass of the water at the measurement line is measured.
- The volumes of several flasks are measured.
- The water when filled to the measurement line is poured into a second flask.
(2) the density of the unknown metal is determined. What units are used in this determination?
- mg/mL
- g/L
- g/cm^3
- mL/g
(3) What is the final goal of this lab? What is the atomic quantity you are to report?
- Density of the metal
- Volume of the measuring flask
- Mass of the metal used
- Atomic radius of the metal
Homework Answers
1.Add Answer to:
(1) In the procedure, one step is to calibrate the
volume of the flask you will...
Having obtained the volume of a flask (25.001 mL), the student then emptied the flask and...
Having obtained the volume of a flask (25.001 mL), the student then emptied the flask and dried it. The mass of the empty stoppered flask was 25.710 g. To the empty flask they added pieces of a metal until the flask was about three-fourths full. The student weighed the stoppered flask and its metal contents and found that the mass was 162.071 g. They then filled the flask with water, stoppered it, and obtained a total mass of 167.932 g...
You are checking the accuracy of a volumetric flask marked 10.00 mL. Measurement| Volume (mL) You...
You are checking the accuracy of a volumetric flask marked 10.00 mL. Measurement| Volume (mL) You measure the volume of water contained in the flask by measuring the mass of the empty flask, the mass of the flask filled with water, taking the difference, correcting for the buoyancy factor, and dividing by the density of the water. The results of eight such measurements are given in the table 10.064 10.063 10.017 10.049 10.020 10.025 10.045 10.008 2 3 4 5...
question one question two Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine...
question one
question two
Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine the concentration of aspirin in an unknown sample. The absorbance spectrum of the highest concentration standard [Fe3+, SA) prepared is given below. What wavelength should be used to create the calibration curve for the experiment? Explain your reasoning. 0.14 Absorbance 0.02 250 300 450 500 350 400 Wavelength (nm) Wavelength Explain your reason briefly. b) In this experiment an aspirin tablet was placed in...
Two methods were descibed for determining the volume of the flask used for the molar mass...
Two methods were descibed for determining the volume of the
flask used for the molar mass determination. Which method will give
a more precise determination of the volume? Why?
When two acceptable determinations of the weight of vapor needed to fill the flask have been obtained, remove the foil cover from the flask (do not discard) and clean out the flask. Fill the flask to the very rim with tap water, cover with the foil cover, and weigh the flask,...
In lab you determine the mass of an empty Erlenmeyer flask to be 53.5g. After adding metal, the mass of the flask is now 95.6g. After filling the flask up to the top with water, its mass is now...
In lab you determine the mass of an empty Erlenmeyer flask to be 53.5g. After adding metal, the mass of the flask is now 95.6g. After filling the flask up to the top with water, its mass is now 130.0g You then empty the flask and refill it entirely with water. The mass of the flask full of water is 103.5g What is the density of the metal in g/ml? (The density of water is 1.00g/ml). You have 865g of...
Which one of the following is the most important reason to calibrate equipment used for measurements?...
Which one of the following is the most important reason to calibrate equipment used for measurements? Select one: a. It will increase the range of the measurement. b. It will decrease the percent error of the measurement c. It will decrease the range of the measurement. d. It will increase the percent error of the measurement. Which of the following types of equipment may need to be calibrated? Select one: a. analytical balances O b. gasoline pumps O c. fitness...
You are given an unknown containing KClO3. Following the procedure in your manual, you obtain the...
You are given an unknown containing KClO3. Following the procedure in your manual, you obtain the following fictional data Note! For this problem use the given (allbeit incorrect) vapor pressure of water Mass of empty test tube 71.8394 g Mass of test tube + unknown 72.1363 g Mass of test tube + unknown + MnO2 72.3077 g Mass of erlenmeyer flask with residual water 323.06 g Mass of erlenmeyer flask filled with water 358.52 g Atmospheric pressure 760.9 mmHg Temperature...
Show steps Consider the set of data, below, of the mass and volume of an unknown...
Show steps
Consider the set of data, below, of the mass and volume of an unknown metal measured with various measuring devices. This data can be used to calculate the density of the metal. Trial # Mass (measured on a balance) Volume (measured in a graduated cylinder) 24.356 g 22.0 mL 23.2 g 21.090 mL 229 20 mL 24.123 g 22.10 ml Which trial would give the most precise value for density? Which trial would give the least precise value?...
What is the effect on the calculated density of the unknown metal or liquid under the...
What is the effect on the calculated density of the unknown metal or liquid under the following conditions? After the flask was filled with unknown liquid the cover slip was placed on top. In doing so a small air bubble was trapped under the cover slip. When determining the density of the unknown metal, the flask was filled less than one quarter way with the metal instead of halfway. When determining the volume of the flask, the student did not...
A flask was filled with 150.00 mL of ethanol. By weighing the flask before and after...
A flask was filled with 150.00 mL of ethanol. By weighing the flask before and after adding the ethanol, it was determined that the flask contained 118.40 g of ethanol. In a second experiment, 20.5362 g of metal beads were added to the flask, and the flask was again filled to the 150.00 mL mark with ethanol. The total mass of the metal plus alcohol in the flask was determined to be 141.67 g. What is the density of the...
Having obtained the volume of a flask (25.001 mL), the student then emptied the flask and dried it. The mass of the empty stoppered flask was 25.710 g. To the empty flask they added pieces of a metal until the flask was about three-fourths full. The student weighed the stoppered flask and its metal contents and found that the mass was 162.071 g. They then filled the flask with water, stoppered it, and obtained a total mass of 167.932 g...
You are checking the accuracy of a volumetric flask marked 10.00 mL. Measurement| Volume (mL) You measure the volume of water contained in the flask by measuring the mass of the empty flask, the mass of the flask filled with water, taking the difference, correcting for the buoyancy factor, and dividing by the density of the water. The results of eight such measurements are given in the table 10.064 10.063 10.017 10.049 10.020 10.025 10.045 10.008 2 3 4 5...
question one
question two
Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine the concentration of aspirin in an unknown sample. The absorbance spectrum of the highest concentration standard [Fe3+, SA) prepared is given below. What wavelength should be used to create the calibration curve for the experiment? Explain your reasoning. 0.14 Absorbance 0.02 250 300 450 500 350 400 Wavelength (nm) Wavelength Explain your reason briefly. b) In this experiment an aspirin tablet was placed in...
Two methods were descibed for determining the volume of the
flask used for the molar mass determination. Which method will give
a more precise determination of the volume? Why?
When two acceptable determinations of the weight of vapor needed to fill the flask have been obtained, remove the foil cover from the flask (do not discard) and clean out the flask. Fill the flask to the very rim with tap water, cover with the foil cover, and weigh the flask,...
In lab you determine the mass of an empty Erlenmeyer flask to be 53.5g. After adding metal, the mass of the flask is now 95.6g. After filling the flask up to the top with water, its mass is now 130.0g You then empty the flask and refill it entirely with water. The mass of the flask full of water is 103.5g What is the density of the metal in g/ml? (The density of water is 1.00g/ml). You have 865g of...
Which one of the following is the most important reason to calibrate equipment used for measurements? Select one: a. It will increase the range of the measurement. b. It will decrease the percent error of the measurement c. It will decrease the range of the measurement. d. It will increase the percent error of the measurement. Which of the following types of equipment may need to be calibrated? Select one: a. analytical balances O b. gasoline pumps O c. fitness...
Show steps
Consider the set of data, below, of the mass and volume of an unknown metal measured with various measuring devices. This data can be used to calculate the density of the metal. Trial # Mass (measured on a balance) Volume (measured in a graduated cylinder) 24.356 g 22.0 mL 23.2 g 21.090 mL 229 20 mL 24.123 g 22.10 ml Which trial would give the most precise value for density? Which trial would give the least precise value?...
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