Density determination chemistry LAB experiment 1- If the regularly shaped solid block were hollow, would the...
Density determination chemistry LAB experiment
1- If the regularly shaped solid block were hollow, would the determined density be too high or too low compared to the true value for the solid block? Explain in details why.
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Density determination chemistry LAB experiment
1- If the regularly shaped solid block were hollow, would the...
Chemistry Lab Need help with the questions Experiment 1
Chemistry Lab Need help with the questions Experiment 1 Trial 1 Trial 2 Trial 3 a) Mass of copper (g) 10g 15g 20g b) Moles of copper (mol) 0.157 mol 0.236 mol 0.314 mol c) Mass of copper and crucible (g) 98.000g 103.000g 108.000g d) Mass of copper oxide and the crucible (g) 100.518g 106.777g 113.035g e) Mass of oxygen gained from reaction (g) 2.518g 3.777g 15.035g f) Moles of oxygen...
Determination of Ka and Identification of an Unknown Weak Acid Post-lab Question 1. Suppose that a student performi...
Determination of Ka and Identification of an Unknown Weak Acid Post-lab Question 1. Suppose that a student performing this experiment mistakenly calibrated the pH meter using pH 8 buffer instead of pH 7 buffer. As a result of this error, all of the student's pH readings were too low. a) Would this error have affected the calculated molar mass of the unknown acid? Briefly explain. b) Would this error have affected the experimentally determined pKa of the unknown acid? Briefly...
The experiment this is in reference to is the determination of molar mass of a metal....
The experiment this is in
reference to is the determination of molar mass of a metal. a piece
of magnesium ribbon was dangled on a copper wire into a tube with
tap water and hydrochloric acid then placed into a beaker of water
that was at room temperature.
Questions 1. Practice: Oxygen can be generated by thermal decomposition of potassium chlorate: 2 KClO3 (s) —> 2 KCl (s) + 3 O2 (g) Calculate the volume of oxygen (in liters) produced...
• Material from the Acid-Base Titration Experiment. If you were to overtitrate without realizing it, would...
• Material from the Acid-Base Titration Experiment. If you were to overtitrate without realizing it, would the following results come out too high, too low or unchanged? Be able to explain your answer. concentration of acetic acid in vinegar • mass percent of acetic acid in vinegar? o What is the purpose of adding deionized water to the vinegar in the Erlenmeyer flask? Does it affect the endpoint? Explain why or why not.
In an experiment. it is possible to calculate the moles of oxygen from either the volume...
In an experiment. it is possible to calculate the moles of oxygen from either the volume formed at STP or from the weight of oxygen generated. Which gives the more accurate value? Why? Explain thee effect that failure to subtract the water vapor pressure from the total pressure would have on your determination of molar volume? (Would your molar volume be too high, the same, or too low and why?)
Post Lab Questions 1. in a hurry to complete the experiment, the student failed to calibrate...
Post Lab Questions 1. in a hurry to complete the experiment, the student failed to calibrate the Spectrophotometer. As a result, all absorbance values for the standard solutions that are measured and recorded are too high. How will this affect the following calculations in Part B? a. Will the calculated equilibrium concentrations of FeSCN** be too high, too low, or unaffected? Explain. b. Will the calculated equilibrium constants be too high, too low, or unaffected? Explain. 2. In Part A,...
organic chemistry lab // Grignard Rection 1. What would happen if iodine cyrstals are not added...
organic chemistry lab // Grignard Rection 1. What would happen if iodine cyrstals are not added to the grignard reagent. ( Explain chemically in detail please). 2. How does low temperature affect the formation of the grignard reagent and how too much heat affects the formation of the grignard reagent ( Explain chemically in detail please). 3. How Hcl can affect the formationof the Grignard reagent ( Explain chemically in detail please).
Ksp of Ca(IO3)2 lab questions 1) Why is it necessary to filter the calcium iodate solution through dry filter paper, without adding any water? 2) If water had been added during the filtration process,...
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at 15.0°C 20.0°C, 22.0°C, 25.0°C, Post-Laboratory Questions 1. Write down the values for the density of...
at 15.0°C 20.0°C, 22.0°C, 25.0°C, Post-Laboratory Questions 1. Write down the values for the density of water at 15.0°C, 20. and 28.0°C. a. Compare the values of the density of water at the above temp temperature affect density? If so, state how. Explain your rease Fat the above temperatures. Does b. Would temperature be a significant source of error for this experiment? Explain your reasoning. 2. In attempting to calculate the density of chloroform, CHCl3, Riley determines the following densities:...
1. When measuring the inner and outer diameters of the hollow block, what were the main...
1. When measuring the inner and outer diameters of the hollow block, what were the main sources of experimental error? Group these errors into those that are systematic and those that are random. 2. How could you improve the measurement of the block diameters? In particular, consider how to improve the accuracy of the average value of diameter and how to reduce the uncertainty in the measurement. 3. To how many significant figures can you state the volume of material...
Determination of Ka and Identification of an Unknown Weak Acid Post-lab Question 1. Suppose that a student performing this experiment mistakenly calibrated the pH meter using pH 8 buffer instead of pH 7 buffer. As a result of this error, all of the student's pH readings were too low. a) Would this error have affected the calculated molar mass of the unknown acid? Briefly explain. b) Would this error have affected the experimentally determined pKa of the unknown acid? Briefly...
The experiment this is in
reference to is the determination of molar mass of a metal. a piece
of magnesium ribbon was dangled on a copper wire into a tube with
tap water and hydrochloric acid then placed into a beaker of water
that was at room temperature.
Questions 1. Practice: Oxygen can be generated by thermal decomposition of potassium chlorate: 2 KClO3 (s) —> 2 KCl (s) + 3 O2 (g) Calculate the volume of oxygen (in liters) produced...
• Material from the Acid-Base Titration Experiment. If you were to overtitrate without realizing it, would the following results come out too high, too low or unchanged? Be able to explain your answer. concentration of acetic acid in vinegar • mass percent of acetic acid in vinegar? o What is the purpose of adding deionized water to the vinegar in the Erlenmeyer flask? Does it affect the endpoint? Explain why or why not.
Post Lab Questions 1. in a hurry to complete the experiment, the student failed to calibrate the Spectrophotometer. As a result, all absorbance values for the standard solutions that are measured and recorded are too high. How will this affect the following calculations in Part B? a. Will the calculated equilibrium concentrations of FeSCN** be too high, too low, or unaffected? Explain. b. Will the calculated equilibrium constants be too high, too low, or unaffected? Explain. 2. In Part A,...
at 15.0°C 20.0°C, 22.0°C, 25.0°C, Post-Laboratory Questions 1. Write down the values for the density of water at 15.0°C, 20. and 28.0°C. a. Compare the values of the density of water at the above temp temperature affect density? If so, state how. Explain your rease Fat the above temperatures. Does b. Would temperature be a significant source of error for this experiment? Explain your reasoning. 2. In attempting to calculate the density of chloroform, CHCl3, Riley determines the following densities:...
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