Homework Answers
The values represent accuracy because it define the closeness of the result with the accepted value whereas precision is the measure of the reliability of the experiment value. Hence, option a is correct.
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5. You measure out 5 mL of water by eye into five different test tubes. When...
Measurement and Accuracy Procedure Obtain 5 large test tubes (all the same size), a test tube...
Measurement and Accuracy Procedure Obtain 5 large test tubes (all the same size), a test tube rack, 3 beakers of colored water A-C, and 3 graduated cylinders. With a Sharpie, label the tubes 1-5 Measure 25 mL of solution from beaker A (red) using a clean graduated cylinder. Pour into tube 1. Measure 28 mL of solution from beaker B (yellow) using a clean graduated cylinder. Pour into tube 3. Measure 22 mL of solution from beaker C (blue) using...
Prepare two test tubes, one containing 5 mL water and one containing 5 mL 0.15 NaCl....
Prepare two test tubes, one containing 5 mL water and one containing 5 mL 0.15 NaCl. Add 0.5 mL of blood to each tube, mix and observe by placing a piece of paper behind each. Which one of these solution will hemolyse? (hint: Only one solution hemolyse). please explain why.
Calculate the initial concentration of Fe3+ in test tubes 1-4. (you will need to take the...
Calculate the initial concentration of Fe3+ in test tubes 1-4. (you will need to take the dilution in to account) Calculate the initial concentration of SCN-in each of test tubes 1-4. (you will need to take the dilution in to account) 2. Label four 20 x 150 mm test tubes 1-4. Pour about 30 mL of 0.0020 M Fe(NO3)3 into a clean, dry 100-ml beaker. Pipet 5.0 mL of this solution into each of the four labeled test tubes. Use...
please answer number 5 5. The AgNO3 test solution was not used to test the water...
please
answer number 5
5. The AgNO3 test solution was not used to test the water insoluble but acid soluble unknowns, only the NaOH and Na2CO3 were used. Propose a reason why the AgNO3 was not used in part 3 of the experiment. Discussion/Conclusion (continue on the back of this page if needed) UTA-705 out each test tube at the sink with soap and water using a tes water and then analytical grade water (twice) and reuse the tu water...
Procedure: 1. 10 Test tubes were labelled (0C,0E,15C,15E,30C,30E,45C,45E,60C, and 60E.) 2. 2 mL cathecol-buffer at pH...
Procedure:
1. 10 Test tubes were labelled
(0C,0E,15C,15E,30C,30E,45C,45E,60C, and 60E.)
2. 2 mL cathecol-buffer at pH 6 was added into each test
tubes.
3. 3.5 mL of water was added into all of the C tubes
(0C,15C,30C,45C, and 60C.)
4. 3 mL of water was added into the remaining tubes.
5.The two tubes were put into an ice bath.
6. 0.5 mL of enzyme polyphenoloxidase was added into tube E when
the mixture had reached certain T (O°C)
7.The transmittance...
Part C. Benedict's Test. Test Tube Samp Prediction Observations Results (+ or -) 2-hydroxybutanal Benzaldehyde Propanone...
Part C. Benedict's Test. Test Tube Samp Prediction Observations Results (+ or -) 2-hydroxybutanal Benzaldehyde Propanone Cyclohexanone Unknown Part D. Iodoform Test. Test Sample Tube 1 2-hydroxybutanal Prediction Observations Results (+ or -) Benzaldehyde Propanone Cyclohexanone Unknown Experiment 12 Identification of Aldehydes and Ketones O the b e t theader of each holding your breath as a st beward your nose. Record the derson the specified memes from O Ta Test g shes between ones that contain a methyl group...
2. (25pts) Two different brands of latex (water-based) paint are being considered for use in a large construction project. To choose between the brands, one of the key factors is the time it takes th...
2. (25pts) Two different brands of latex (water-based) paint are being considered for use in a large construction project. To choose between the brands, one of the key factors is the time it takes the paint to dry. Engineers sampled 22 specimens of each brand and measured the drying times (in hours) of each specimen. The data collected are given in Table 1 below Specimen Brand A Brand B Specin Brand A Brand B 3.5 2.7 3.9 4.2 4.6 2.7...
Principles of Inorganic Chemistry! Week 5 Effect of Temperature on Solubility of a Salt In this experiment, you w...
Principles of Inorganic Chemistry! Week 5 Effect of Temperature on Solubility of a Salt In this experiment, you will study the effect of changing temperature on the amount of solute that will dissolve in a given amount of water. Water solubility is an important physical property in chemistry, and is often expressed as the mass of solute that dissolves in 100 g of water at a certain temperature. In this experiment, you will completely dissolve different quantities of potassium nitrate,...
In this experiment you will be measuring pH for several different solutions. A pH probe will...
In this experiment you will be measuring pH for several
different solutions. A pH probe will be used rather than pH paper
as it will be more accurate.
You will be testing the pH of six solutions: deionized water,
0.1 M HCl, 0.1 M HCH3COO, 0.1 M NaCH3COO, 0.1
M NaOH, and a buffer made by mixing equal parts of
HCH3COO and NaCH3COO.
You will measure the pH of each solution three times:
Neat - just the solution
After the...
Write out your separation scheme for this experiment. 1. Heat 75 mL of water to 90...
Write out your separation scheme for this experiment. 1. Heat 75 mL of water to 90 °C in a 250-mL beaker. 2. While the water is being heated, place 250 mg of salicylic acid, 1 drop of 85% phosphoric acid and 0.5 mL of acetic anhydride in a test tube. Add a boiling chip to the mixture and gently shake it in order to mix the reactants. 3. Heat the tube in the beaker of water at 85 - 90...
Calculate the initial concentration of Fe3+ in test tubes 1-4. (you will need to take the dilution in to account) Calculate the initial concentration of SCN-in each of test tubes 1-4. (you will need to take the dilution in to account) 2. Label four 20 x 150 mm test tubes 1-4. Pour about 30 mL of 0.0020 M Fe(NO3)3 into a clean, dry 100-ml beaker. Pipet 5.0 mL of this solution into each of the four labeled test tubes. Use...
please
answer number 5
5. The AgNO3 test solution was not used to test the water insoluble but acid soluble unknowns, only the NaOH and Na2CO3 were used. Propose a reason why the AgNO3 was not used in part 3 of the experiment. Discussion/Conclusion (continue on the back of this page if needed) UTA-705 out each test tube at the sink with soap and water using a tes water and then analytical grade water (twice) and reuse the tu water...
Procedure:
1. 10 Test tubes were labelled
(0C,0E,15C,15E,30C,30E,45C,45E,60C, and 60E.)
2. 2 mL cathecol-buffer at pH 6 was added into each test
tubes.
3. 3.5 mL of water was added into all of the C tubes
(0C,15C,30C,45C, and 60C.)
4. 3 mL of water was added into the remaining tubes.
5.The two tubes were put into an ice bath.
6. 0.5 mL of enzyme polyphenoloxidase was added into tube E when
the mixture had reached certain T (O°C)
7.The transmittance...
Part C. Benedict's Test. Test Tube Samp Prediction Observations Results (+ or -) 2-hydroxybutanal Benzaldehyde Propanone Cyclohexanone Unknown Part D. Iodoform Test. Test Sample Tube 1 2-hydroxybutanal Prediction Observations Results (+ or -) Benzaldehyde Propanone Cyclohexanone Unknown Experiment 12 Identification of Aldehydes and Ketones O the b e t theader of each holding your breath as a st beward your nose. Record the derson the specified memes from O Ta Test g shes between ones that contain a methyl group...
2. (25pts) Two different brands of latex (water-based) paint are being considered for use in a large construction project. To choose between the brands, one of the key factors is the time it takes the paint to dry. Engineers sampled 22 specimens of each brand and measured the drying times (in hours) of each specimen. The data collected are given in Table 1 below Specimen Brand A Brand B Specin Brand A Brand B 3.5 2.7 3.9 4.2 4.6 2.7...
Principles of Inorganic Chemistry! Week 5 Effect of Temperature on Solubility of a Salt In this experiment, you will study the effect of changing temperature on the amount of solute that will dissolve in a given amount of water. Water solubility is an important physical property in chemistry, and is often expressed as the mass of solute that dissolves in 100 g of water at a certain temperature. In this experiment, you will completely dissolve different quantities of potassium nitrate,...
In this experiment you will be measuring pH for several
different solutions. A pH probe will be used rather than pH paper
as it will be more accurate.
You will be testing the pH of six solutions: deionized water,
0.1 M HCl, 0.1 M HCH3COO, 0.1 M NaCH3COO, 0.1
M NaOH, and a buffer made by mixing equal parts of
HCH3COO and NaCH3COO.
You will measure the pH of each solution three times:
Neat - just the solution
After the...
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