When using an conductivity probe, at lower concentrations, you will have 2 or 3 calibration curves....
When using an conductivity probe, at lower concentrations, you will have 2 or 3 calibration curves. What physical device are you actually calibrating when you switch the range selector?
Homework Answers
When you switch the range Selector you are actually setting the expected range of your output. At lower concentrations this needs to be accurately set,so that one can easily identify the correct output.
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When using an conductivity probe, at lower concentrations, you
will have 2 or 3 calibration curves....
Question 6 6 points Save Answe You construct a calibration curve for conductivity of Na2HPO4 solutions...
Question 6 6 points Save Answe You construct a calibration curve for conductivity of Na2HPO4 solutions with concentration (M) on the x axis and conductivity (ms) on the y-axis. You have a sample of Na2HPO4 that you want to determine the concentration of using this curve. You measure its conductivity to be 3.93 ms. The equation for the line from your calibration curve is y = 138 mS/M X +0.25 ms. Use this information to determine the concentration of your...
Beer’s Law Objective : We will explore an application of absorption spectroscopy using calibration curves and...
Beer’s Law Objective : We will explore an application of absorption spectroscopy using calibration curves and Beer’s Law. Use the “LAB : HOW TO…” link from the class website if you need help with how to use balance, Bunsen burner… and such. Introduction: You may write this information in your lab notebook for your own reference. It can’t be cut and pasted. Different solutions have different spectral properties. In this portion of the experiment those properties will be utilized to...
3) What two factors are held constant when constructing a calibration curve? 4) Briefly explain the...
3) What two factors are held constant when constructing a calibration curve? 4) Briefly explain the purpose of using a "blank" before measuring your calibration solutions. 5) For a solution that appears blue in color, which wavelength of light in nm is expected to be absorbed most strongly? Give the approximate value or range of values.
Question 1: When creating the calibration curve during week 1, it was determined that [KSCN] = [...
Question 1: When creating the calibration curve during week 1, it was determined that [KSCN] = [FeSCN2+] at equilibrium. Explain why these two concentrations were equal in terms of the relative concentrations of each reactant, the limiting reactant, and the direction in which the reaction proceeded Question 2: Describe the process by which equilibrium concentrations of the reactants and product were determined. Include in your discussion, how the equilibrium (final) concentration of FeSCN2+ was determined using a calibration curve, mole-to-mole...
please show the work Prelab for Experiment 5 - Conductivity and Chemical Reactions 2.34E-4. The 'E' must be capitalized." Scientific notation format The prelab questions mirror tho...
please show the work
Prelab for Experiment 5 - Conductivity and Chemical Reactions 2.34E-4. The 'E' must be capitalized." Scientific notation format The prelab questions mirror those that you will be doing at the end of the experiment. Bring your work for this prelab assignment to lab and you will have a much easier time completing the Data Analysis Sheet at the end of the experiment. Student information Enter your name (first and last) and the last 4 digits of...
The Absorbance for the highest concentration of starch is lower than you might have expected. What...
The Absorbance for the highest concentration of starch is lower than you might have expected. What is the most likely reason for this? The sample was prepared incorrectly and actually has a lower starch concentration than indicated. Not enough Lugols was added, and not all of the starch is being detected. The measurement was made inaccurately, and the Absorbance is probably higher than indicated. Spectrophotometer readings are inaccurate near their maximum value of 2. You have series of starch solutions...
Explain 3. You have a material whose conductivity is being measured as temperature is decreasing. The...
Explain
3. You have a material whose conductivity is being measured as temperature is decreasing. The conductivity is very low until you reach a certain temperature. At this temperature, the conductivity increased rapidly. What kind of material do you have? What is the temperature called at which the material starts to conduct?
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in ...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in a circuit (unless it is using a current probe)? 2. Consider Figure 1. According to the calculations in the lab handout, if Z-1kΩ +/6914, then the phase difference (фи-фі) between u(t) and i (t) is 34.6". a. If this v(t) and i(t) were displayed on a DSO (v(t) being a node voltage and using a current probe for i(t) as shown in...
Tips for Lab Discussion • Discuss calibration curve and slope determined. Discuss concentration of copper found....
Tips for Lab Discussion • Discuss calibration curve and slope determined. Discuss concentration of copper found. Discuss percent of copper in brass sample calculated. Discuss sources of success or error encountered during the experiment Practice Problems 1- Why is a calibration curve constructed? 2- If you used a dirty cuvette when reading when the calibration curve, would this raise or lower the value of the slope? Explain. 3- If unknown to the student, the standard CuSO4.5H2O solution was prepared using...
Conductivity of Solutions For Che 2A at RCC Introduction Electrolytes are compounds which conduct electricity when...
Conductivity of Solutions For Che 2A at RCC Introduction Electrolytes are compounds which conduct electricity when dissolved in water. Strong electrolytes consist of ionic compounds which dissociate completely when dissolved in water, AND molecular compounds which completely ionize when dissolved in water. The reactions below illustrate the dissociation reaction of strong electrolytes: Na (aq) + Cl(aq) но NaCl(s) H30 CaBra(s) HO HCl(e) Ca(aq) + 2Br (aa) H*(aq) + C'(aq) Conductivity is a measure of the ability of water to pass...
Question 6 6 points Save Answe You construct a calibration curve for conductivity of Na2HPO4 solutions with concentration (M) on the x axis and conductivity (ms) on the y-axis. You have a sample of Na2HPO4 that you want to determine the concentration of using this curve. You measure its conductivity to be 3.93 ms. The equation for the line from your calibration curve is y = 138 mS/M X +0.25 ms. Use this information to determine the concentration of your...
3) What two factors are held constant when constructing a calibration curve? 4) Briefly explain the purpose of using a "blank" before measuring your calibration solutions. 5) For a solution that appears blue in color, which wavelength of light in nm is expected to be absorbed most strongly? Give the approximate value or range of values.
please show the work
Prelab for Experiment 5 - Conductivity and Chemical Reactions 2.34E-4. The 'E' must be capitalized." Scientific notation format The prelab questions mirror those that you will be doing at the end of the experiment. Bring your work for this prelab assignment to lab and you will have a much easier time completing the Data Analysis Sheet at the end of the experiment. Student information Enter your name (first and last) and the last 4 digits of...
The Absorbance for the highest concentration of starch is lower than you might have expected. What is the most likely reason for this? The sample was prepared incorrectly and actually has a lower starch concentration than indicated. Not enough Lugols was added, and not all of the starch is being detected. The measurement was made inaccurately, and the Absorbance is probably higher than indicated. Spectrophotometer readings are inaccurate near their maximum value of 2. You have series of starch solutions...
Explain
3. You have a material whose conductivity is being measured as temperature is decreasing. The conductivity is very low until you reach a certain temperature. At this temperature, the conductivity increased rapidly. What kind of material do you have? What is the temperature called at which the material starts to conduct?
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in a circuit (unless it is using a current probe)? 2. Consider Figure 1. According to the calculations in the lab handout, if Z-1kΩ +/6914, then the phase difference (фи-фі) between u(t) and i (t) is 34.6". a. If this v(t) and i(t) were displayed on a DSO (v(t) being a node voltage and using a current probe for i(t) as shown in...
Tips for Lab Discussion • Discuss calibration curve and slope determined. Discuss concentration of copper found. Discuss percent of copper in brass sample calculated. Discuss sources of success or error encountered during the experiment Practice Problems 1- Why is a calibration curve constructed? 2- If you used a dirty cuvette when reading when the calibration curve, would this raise or lower the value of the slope? Explain. 3- If unknown to the student, the standard CuSO4.5H2O solution was prepared using...
Conductivity of Solutions For Che 2A at RCC Introduction Electrolytes are compounds which conduct electricity when dissolved in water. Strong electrolytes consist of ionic compounds which dissociate completely when dissolved in water, AND molecular compounds which completely ionize when dissolved in water. The reactions below illustrate the dissociation reaction of strong electrolytes: Na (aq) + Cl(aq) но NaCl(s) H30 CaBra(s) HO HCl(e) Ca(aq) + 2Br (aa) H*(aq) + C'(aq) Conductivity is a measure of the ability of water to pass...
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