Laboratory Questions Circle the questions that have been assigned. 1. The pH meter was not properly...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Laboratory Questions Circle the questions that have been assigned. 1. The pH meter was not properly calibrated. a. How does this experimental error affect the precision of your data? Explain. b. How does this experimental error affect the accuracy of your data? Explain. 2. The pH meter was mistakenly calibrated to be 1.0 pH unit higher than the buffer. a. Part A. Will this miscalibration result in a reported molar concentration of the weak acid being too high, too low, or unaffected? Explain. b. Part B. Is the determined pK, of the weak acid too high, too low, or unaffected by the miscalibration? Explain. 3. a. Part A.4. The pH reading is taken before the pH meter stabilizes. As a result, the pH reading may be too low. Explain. b. Part A.4. Explain why it is good technique to slow the addition of NaOH titrant near the stoichiometric point. c. Part A.5. While not absolutely necessary, why is it good technique to add NaOH titrant beyond the stoichiometric point? 4. Part B.1. The solid acid is dissolved in 100 mL of deionized water, followed by 10 mL of ethanol. How does this added volume affect the reported molar mass of the weak acid-too high, too low, or unaffected? Explain. 5. Part B.4. As a result of adding the NaOH titrant too rapidly and an unwillingness to allow the pH meter to equilibrate before reading its pH, the stoichiometric point is ill defined. As a result of this technique error, a. will the molar mass of the weak acid be reported as too high or too low? Explain. b. will the pK, of the weak acid be reported as too high or too low? Explain. 6. Ideally, how many stoichiometric points would be observed on a pH titration curve for a diprotic acid? Sketch the appearance of its titration curve and explain. 236 Potentiometric Analyses Laboratory Questions Circle the questions that have been assigned. 1. The pH meter was not properly calibrated. a. How does this experimental error affect the precision of your data? Explain. b. How does this experimental error affect the accuracy of your data? Explain. 2. The pH meter was mistakenly calibrated to be 1.0 pH unit higher than the buffer. a. Part A. Will this miscalibration result in a reported molar concentration of the weak acid being too high, too low, or unaffected? Explain. b. Part B. Is the determined pK, of the weak acid too high, too low, or unaffected by the miscalibration? Explain. 3. a. Part A.4. The pH reading is taken before the pH meter stabilizes. As a result, the pH reading may be too low. Explain. b. Part A.4. Explain why it is good technique to slow the addition of NaOH titrant near the stoichiometric point. c. Part A.5. While not absolutely necessary, why is it good technique to add NaOH titrant beyond the stoichiometric point? 4. Part B.1. The solid acid is dissolved in 100 mL of deionized water, followed by 10 mL of ethanol. How does this added volume affect the reported molar mass of the weak acid-too high, too low, or unaffected? Explain. 5. Part B.4. As a result of adding the NaOH titrant too rapidly and an unwillingness to allow the pH meter to equilibrate before reading its pH, the stoichiometric point is ill defined. As a result of this technique error, a. will the molar mass of the weak acid be reported as too high or too low? Explain. b. will the pK, of the weak acid be reported as too high or too low? Explain. 6. Ideally, how many stoichiometric points would be observed on a pH titration curve for a diprotic acid? Sketch the appearance of its titration curve and explain. 236 Potentiometric Analyses
Expert Answer:
Answer rating: 100% (QA)
1 The pH meter was not properly calibrated a How does this experimental error affect the precision of your data Explain This experimental error affects the precision of the data because it results in ... View the full answer
Related Book For
Financial Accounting
ISBN: 978-1259222139
9th edition
Authors: Robert Libby, Patricia Libby, Frank Hodge
Posted Date:
Students also viewed these chemistry questions
-
Consider the laws that have been imposed on individuals and businesses to control pollution and reduce waste. Is this a reasonable demand? Consider how these policies might affect Canadians who move...
-
Identify and discuss the limitations that have been imposed on the general business tax credit including the overall ceiling limitation based on the tax liability.
-
Use Part 1 and the budgets that have been completed to fill out the empty budgets shown and answer question #7 and #9 Part 1 I have a template set up on the Budgetsolution worksheet that you should...
-
Comparative financial statements of the Boeckman Company for 2009 and 2010 are as follows: Comparative Balance Sheets Comparative Income Statements Additional information: The Boeckman Company is...
-
Lake Anna Marine Supply reported the following comparative income statements for the years ended June 30, 2014, and 2013: Lake Annas president and shareholders are thrilled by the companys boost in...
-
A friend who owns a perpetuity that promises to pay $1,000 at the end of each year, forever, comes to you and offers to sell you all of the payments to be received after the 25th year for a price of...
-
Amanda Forbes was hired as a nail technician by Showmann, Inc., in 2011. In 2017, Forbes attended a work-related holiday party where Showmann distributed raffle tickets to employees. One of the...
-
Fancy Foods produces two types of microwavable products: beef-flavored ramen and shrimp-flavored ramen. The two products share common inputs such as noodle and spices. The production of ramen results...
-
You will be taking over the vending machine business at UNCC from Tony. You are selling 20-ounce bottles of Dasani bottled water for $1.25, and Tony will give you a large stock of Dasani to get you...
-
return and covariance matrix are given as follows. L2 Three securities are available for investment, and their expected rates of 3 = 0.12 0.02 0.02 2 01 012 2 021 02 013 023 2 031 032 03 = 0.04...
-
Analyze the implications of diffusion of responsibility. Diffusion of responsibility is a psychological phenomenon in which people are less likely to take action or feel a sense of responsibility in...
-
Explain, quantifying your answer where necessary and including reasons, how you would account for each of these items in compliance with IAS 37. [12 marks] Discuss whether the requirements of IAS 37...
-
Construct a Turing machine for (0+1)*.0.1.0.(0+1)*. Q.34 Identify the optimization techniques required to optimize the following code. Also, mention the optimized code. a = 200; while(a>0) { } b = x...
-
According to Jensen (2001), "Corporate budgeting is a joke and everyone knows it. It consumes a huge amount of executives' time, forcing them into endless rounds of dull meetings and tense...
-
Selecciona, entre las opciones, la que presente el trmino que complete el espacio en blanco en el siguiente enunciado: En la tercera oracin del prrafo del recuadro, la estructura "un incalculable...
-
Consider a LM555 circuit with these parameters: R = 5k, R = 10k and C=100uF. Answer the following questions by including all the steps. (15 points, 5 points each) a. Write the equation for TH and...
-
Today is year 0. You are told that the evolution of future discount functions can be described by the following tree diagram. The first number at each node is the price of a zero coupon bond that...
-
A Alkynes can be made by dehydrohalogenation of vinylic halides in a reaction that is essentially an E2 process. In studying the stereochemistry of this elimination, it was found that...
-
Super Savers Department Store's balance sheet revealed the following information: Current assets ................................ $750,000 Noncurrent assets ........................... 450,000...
-
GMAC Corporation is planning to issue bonds with a face value of $250,000 and a coupon rate of 6 percent. The bonds mature in five years and pay interest semiannually every June 30 and December 31....
-
Refer to the financial statements of Urban Outfitters in Appendix C at the end of the book. Required: 1. What is the company's revenue recognition policy? (Look in the notes to the financial...
-
Draw a block diagram for the feedback control of a liquid-level system, which consists of a valve with a control knob (0\%-100\%) and a liquid-level sensor. Clearly label essential components and...
-
A control system is represented using the block diagram shown in Figure 10.59. Sketch the root locus with respect to the proportional control gain K. Determine all the values of \(K\) for which the...
-
Roughly sketch the root locus with respect to \(K\) for the equation of \(1+K L(s)=0\) and the following choices for \(L(s)\). Make sure to give the asymptotes, arrival or departure angles, and...
Study smarter with the SolutionInn App