Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Related questions
Question
How do I find the standard deviation of the molaR CONCENTRATION and the relative standard deviation? The values are in the picture
Transcribed Image Text:Trial 1
Trial 2
Trial 3
0.6163 g
0.623 g
0.6130 g
1. Tared mass of KHC3H,O4 (g)
2. Molar mass of KHC3H,O4
204.23 g/mol
3. Moles of KHC3H,O4 (mol)
0.6163 / 204.23 = 0.00302
0.623 / 204.23 = 0.00305
0.6130 / 204.23 = 0.00300
Titration apparatus approval
0.2
0.2
0.2
4. Buret reading of NaOH, initial (mL)
22.5
22.7
22.6
5. Buret reading of NaOH, final (mL)
6. Volume of NaOH dispensed (mL)
22.5 - 0.2 = 22.3
22.7 - 0.2 = 22.5
22.6 - 0.2 = 22.4
7. Molar concentration of NaOH (mol/L)
0.00302 /(22.3 * 10^-3) = 0.135 0.00305 /(22.5 * 10^-3) = 0.136 0.00300 /(22.4 * 10^-3) = 0.134
8. Average molar concentration of NaOH (mol/L)
0.135
Data Analysis, B
9. Standard deviation of molar concentration
Data Analysis, C
10. Relative standard deviation of molar concentration (%RSD)
Data Analysis, B
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 3 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Standard Deviation Problem The mass of an object was recorded using analytical balance in the lab. Three trials were conducted. The values obtained were 3.678 g, 4.988 g, and 4.541 g. a) Calculate Average. b) Calculate Standard deviation.arrow_forwardCalculate the standard deviation of the four trials below. Trial 1: 49.59 grams Trial 2: 51.25 grams Trial 3: 49.78 grams Trial 4: 50.19 gramsarrow_forwardA student determines the concentration of an unknown sample using two different methods. Each method has three different trials; the average, standard deviation and percent error produced by each method is listed below. Method 1 Average: 10.56 M NaOH Standard deviation: 1.35 M NaOH Percent error: 1.25% Method 2 Average: 10.92 M NaOH Standard deviation: 1.02 M NaOH Percent error: 3.45% Which method was more precise? How can you tell?arrow_forward
- A student weighed 10 pennies on a balance and recorded the following masses: 3.112 g, 3.109 g, 3.059g, 3.079 g, 3.025g 3.081 g, 2.504 g, 3.050 g, 3.072 g, 3.064g a)Are there outliers among the masses of pennies? b)Calculate the mean mass of pennies and the standard deviation,withthe outlier(s) excluded. c)Re-write the mean mass of pennies with the precisionindicatedarrow_forwardAn ore sample was analyzed for its Fe content. Student A analyzed the sample a total of six times and her results had a standard deviation of 1.33. The same sample was analyzed five times by Student B and his results had a standard deviation of 3.42. To determine if their standard deviations are similar, they perform an F test. The calculated F value is and the table value of Fis 3 in your book for critical values of F. O 6.61; 7.39 O 6.61; 9.36 O 0.151; 9.36 O 2.57; 7.39 O 6.61; 6.98 Refer to Table 4-arrow_forwardIn a particular trial, a student got a value for R of 0.083. Calculate the percent deviation of this result. Enter a number without the % sign. The percent deviation should be reported as a positive value.arrow_forward
- Calculate the sample standard deviation, s, for this set of data: 4.5, 6.7, 4.2, 9.6, 3.4, 8.2 Report your answer to the fourth decimal place.arrow_forwardCalculate the sample standard deviation, s, for this set of data: 1.9, 1.5, 6.0, 2.0, 1.4, 1.2 Report your answer to the fourth decimal place.arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
ChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill Education
Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning 
Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill Education
Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning
Elementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Chemistry
Chemistry
ISBN:9781259911156
Author:Raymond Chang Dr., Jason Overby Professor
Publisher:McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9780078021558
Author:Janice Gorzynski Smith Dr.
Publisher:McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Elementary Principles of Chemical Processes, Bind...
Chemistry
ISBN:9781118431221
Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:WILEY