A titration was carried out to determine the volume of base needed to neutralize an acid. Five runs were completed and the volumes obtained were: 25.62 mL, 23.54 mL, 26.77 mL, 22.95 mL, and 27.48 mL. Calculate the standard deviation. Σα O = (n - 1)

A titration was carried out to determine the volume of base needed to neutralize an acid. Five runs were completed and the volumes obtained were: 25.62 mL, 23.54 mL, 26.77 mL, 22.95 mL, and 27.48 mL. Calculate the standard deviation. Σα O = (n - 1)

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

ChapterA1: Evaluation Of Analytical Data

Section: Chapter Questions

Problem A1.20QAP

See similar textbooks

Related questions

Q: d) The following data was obtained from the determination of lead, Pb in a wastewater sample. Four…

A: The solution is attached below-

Q: Find the standard deviation (if the mass of KHP in three experimental solutions are 0.467,0.48, and…

Q: What are the requirements of a primary standard?

A: Welcome to bartleby !

Q: 1. What's the slope of the calibration curve? 3.95 x 10-5 4.17x10-5 1 20484 25257 2. What's the…

A: The linear regression equation of the calibration curve is: Y = 25257X - 114.32

Q: Chemistry Given the following spectrophotometric data, what is the concentration of the sample?…

Q: The following are three sets of data for the atomic mass on antimony (Sb) from the work of Willard…

A: Note: According to our company's guidelines, I am supposed to answer only first three sub parts. so…

Q: Drinking water with negligible lead content was fortified with 2.28 µg Pb(II)/L. Triplicate…

A: Given: Concentration of drinking water with negligible Pb content = 2.28 µg Pb(II)/L Mean of…

Q: Using the data below, please create a calibration graph and determine the concentration of the…

Q: Calculate the standard deviation for an element whose % in a sample were found to be 20.8, 21.6,…

Q: A pharmaceutical company produces caffeine pills that are each supposed to contain 200 mg of…

Q: To determine the instrument detection limit of Pb2+ ions, a student made 10 blank solutions and…

A: Given: Standard deviation of the signal = 0.199 Equation of the curve =, y = 3.413x + b From here…

Q: Chemist Angelica Benjamin Mai Jesus Measurements 35.6 ppt 35.2 ppt 36.2 ppt 31.7 ppt 37.4 ppt…

A: Precision is defined as the closeness of the measurements to each other. More the closeness of data…

Q: A student wanted to determine the level of lead in amoxicillin powder, so he transferred 148 mg of…

A: Given: The absorbance of the diluted solution, y = 0.48 Calibration equation is given by y = 12.25…

Q: A volume of 250 ml of a 0.05 M solution of a reagent of formula weight (relative molecular mass) 40…

Q: The following results were obtained in the replicate determination of the lead content of a blood…

A: Please find your solution below : Standard deviation is a measure of amount of variation of a set of…

Q: A method for the detection of morphine is used to generate a calibration curve in which the assay…

A: The explanation is given below-

Q: Analysis of a blood sample for inorganic phosphate gives (4.5, 4.20, 3.6, 4.17, 3.88) mg% phosphate.…

Q: The ratio of the number of atoms of the isotopes 69Ga and 71Ga in eight samples from different…

Q: Calculate the standard deviation of the data below. 2.4 ppm, 2.1 ppm, 2.1 ppm, 2.3 ppm, 1.5 ppm

A: Standard deviation:The standard deviation is a measure of the variation in a given set of data. A…

Q: The determination of copper in a sca water sample gave a mean value of 77.81 ug/L and a standard…

Q: What are the differences between systematic and random errors and how do they effect accuracy and…

A: As per the Bartleby guidelines, an expert is allowed to answer one question at a time. Please repost…

Q: A chemical synthesis was carried out four times, resulting in yields of 51.2%,51.2%, 57.4%,57.4%,…

Q: The absorbance of an unknown dye solution is measured to be 0.47 by a spectrometer. The linear…

A: The given expression for the linear equation for the spectrometr calibration is ; Y = 2156.5 X +…

Q: A volumetric calcium analysis on samples of the blood serum of a patient believed to be suffering…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Flask 1 2 3 Flask 1 2 3 initial burette reading 50 mL. 38 mL 28 mL volume EDTA required to chelate…

A: The explanation is given below-

Q: II. Determination of Total Hardness of Water Source of water sample: Volume of water sample 22.00 mL…

A: Given that, Volume of EDTA solution consumed (V1)=14.06mL Molarity of standard EDTA solution used…

Q: You conducted 3 gravimetric determination trials. The average values are: 3.45g, 3.55g, and 3.35g.…

A: Gravimetric analysis: This kind of analysis in chemical science has the application in determining…

Q: Q3. A cellulose coating that weighs at least 3.00 mg is often applied to the exterior of vitamin C…

A: Answer

Q: Glucose levels are routinely monitored in patients suffering from diabetes. The glucose…

Q: In the determination of the concentration of chloride ion in water five experiments were done: 254.3…

A: Given, Concentration of chloride ion in water five experiments were: 254.3 ppm, 254.7 ppm, 249.9…

Q: What is the relative error in the ppt of the following data if the accepted value is 70.05 M? 70.24…

Q: Three titration trials were performed and three molar concentrations of NaOH were calculated. The…

A: We would use formula to calculate standard deviation .

Q: A method of analysis yields masses of gold that are low by 0.4 mg. Calculate the percent relative…

Q: Analysis of plant-food preparation for K ion yielded the following data; A: 7.40 % ; B: 7.50 %: C:…

A: Given: The data for K+ ion yield of plant-food preparation: A: 7.40%; B: 7.50%; C: 7.55% We have to…

Q: A set of samples from an abandoned industrial site detected a suspected groundwater contaminant at a…

Q: Calculate the standard deviation of the four trials below. Trial 1: 49.59 grams Trial 2: 51.25…

A: X X^2 49.59 2459.1681 51.25 2626.5625 49.78 2478.0484 50.19…

Q: Construct a calibration curve based on the following data: Concentration Fe 0.100 0.500 2.00 4.00…

A: The beer’s law explain that the concentration of a solution is directly proportional to the…

Q: 3. Two laboratory staff titrated a 50.00 mL of hydrochloric acid with an unknown concentration with…

A: Smaller the standard deviation of a data set, more precise is the measurement. A more accurate…

Q: With the information from my pictures please help me with the following: 1. Volume at Equivalence…

A: From the titration curve we can figure out equivalence and half equivalence point volumes. Note: As…

Q: Since this standard deviation value is close to the ϭ value, the iron concentration of 18.5 µg Fe/mL…

Q: An atomic absorption method for the determination of the amount of iron present in used jet engine…

A: Solutions- a standard deviation s = 3.1 µg Fe/mL. calculate the 95 and 99% confidence intervals…

Q: 1- Calculate the standard deviation of this group. 2- Calculate the Coefficient of variation.…

A: Standard Deviation and Coefficient of variation can be formulated as :

Q: Which is true for standard deviation (s) for a sample size (n)? A The greater the n, the smaller the…

A: Standard deviations decreases, with the increase in the sample size.

Q: A student measures the density of an Unknown liquid 3times and obtains an average density of…

A: The student performed the experiment three times with a standard deviation of 0.353 g/mL. The…

Q: convert[PNP]/min=11·89 micromelarminue intomamomoles per minute using milliunit CENPI/min* 1:5mL %3D

A: Answer: This is a question based on unit conversion where to convert the molar concentration into…

Q: As part of an analytical chemistry laboratory course, a student measured the Ca2+ content in two…

A: Given Data: Method City-Supplied Drinking Water Well-Supplied Drinking Water FAAS 57.57±0.68…

Q: Barium sulfate from a 1.300-g sample was contaminated with 9.4 mg of Fe2(SO4)3 and weighed a total…

A: Solution We know that A) Hence, the apparent % BaSO4 is 24.153%. B) Hence,…

Q: A standard curve for glucose analysis was prepared.The slope (m) was found to be 1.341 while the…

A: Given: Slope(m) = 1.341 y-intercept = -0.333 Absorbance (y) = 0.151

Question

A titration was carried out to determine the volume of base needed to neutralize an acid. Five runs
were completed and the volumes obtained were: 25.62 mL, 23.54 mL, 26.77 mL, 22.95 mL, and 27.48
mL. Calculate the standard deviation.
(n - 1)

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

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

Hydrocarbons in the cab of an automobile were measured during trips on the New Jersey Turnpike and trips through the Lincoln Tunnel connecting New York and New Jersey. The total concentrations ( ± standard deviation) of m- and p-xylene wereTurnpike: 31.4 ± 27.0 μg/m3 (32 measurements)Tunnel: 54.9 ± 29.8 μg/m3 (32 measurements)Do these results different at the 95% confidence level?
Calculate the standard deviation of the data below. 2.4 ppm, 2.1 ppm, 2.1 ppm, 2.3 ppm, 1.5 ppm
6 A new method for the determination ofanthracene in crude oil is in the developmental phase. Preliminary results using the new method give a standard deviation of 3 ppm when 5 replicates are used. The ‘traditional’ method gives a standard deviation of 7 ppm when 4 replicates are used. Is there a significant difference in the standard deviations for these methods at 95% CL?
Find the mean sand standard deviation of each sample.
Calculate the following. i) The slope (m) and the standard deviation of the slope. ii) The concentration of Na ( CA) in the unknown.
Calculate the mean and sample standard deviation for the following data: 90.0, 90.0, 85.0, 83.0, 80.0, 78.0, 77.0, 75.0, 70.0. Group of answer choices 79.8 ±± 5.83 79.8 ±± 6.23 80.9 ±± 6.75 80.9 ±± 6.37
A sample containing an unknown quantity of cadmium in a water sample gave a reading of 1.4 in an atomic spectrometer. The sample was spiked with a 2 ppm mercury standard and gave a reading of 2.5. The instrument give a reading of zero with no sample. What is the concentration of cadmium in the unknown sample?
Titration of an oxalate sample gave the following percentages: 15.07 % , 15.58 % , and 15.42 % . Calculate the average. Calculate the standard deviation.
Replicate water samples are analyzed for water hardness with the following results: 102.2, 102.8, 103.1, and 102.3 ppm CaCO3. What is the (a) the standard deviation, (b) the relative standard deviation, (c) variance.
The following results were obtained in the replicate determination of the lead content of a blood sample: 0.752, 0.756, 0.752, 0.751, and 0.760 ppm Pb. Calculate the ff: (a) mean (b) standard deviation (c) variance (d) RSD (e) CV (f) Range
Calculate the sample standard deviation, s, for this set of data: 5.2, 7.8, 8.6, 9.6, 2.0, 8.7 Report your answer to the fourth decimal place.
For the determination of iron in used jet engine oil, 30 analyzes with 3 repetitions each were made by atomic absorption method and the standard deviation was found s=2.4 µg Fe/mL. Since this standard deviation value is close to the ϭ value, the iron concentration of 18.5 µg Fe/mL(a) by a single analysis,(b) as the average of the two analyzes,(c) Calculate the 80% and 95% confidence intervals if found as the mean of four analyses.