Given the following data, determine the % relative error if the true concentration of NazSO4 is 0.5000M. Express your answer in 3 decimal places. No need to include the unit. Parameter Value mass of crucible, g 43.2714 Mass of crucible + BaSO4 residue, g 46.143 Volume of sample, ml 28 Molar masses (g/mol): NazsO4 = 142.05 ; BaSO4 = 233.37 Add your answer
Q: A volume of 250 ml of a 0.05 M solution of a reagent of formula weight (relative molecular mass) 40…
A:
Q: Which sentence is false about gravimetric analysis? a. It is used for inorganic b. It is used to…
A: The statement which is false about gravimetric analysis is, Relative precision 3% to 4%
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: A variation of the indicator-dilution method (see preceding problem) is used to measure total blood…
A: The relationship which relates the calibration curve of absorbance (A) and tracer concentration (C)…
Q: Two different laboratories within a company further studied the morantel recovery percentage in…
A: Given data:
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: A titrimetric method for the determination of calcium in limestone was tested with the analysis of a…
A:
Q: Before determining the amount of Na2CO3 in an unknown sample, a student decides to check her…
A: Mean of the five sample given (x-)= (98.71+98.59+ 98.62+98.44+98.58)/5=98.588% let xi = % of i th…
Q: Table 1. Data on EDTA Standardization Weight of CaCO3 (g): 0.2003g Trial Volume of EDTA (mL)…
A: Each of Ca2+ is neutralised with 1 mol of EDTA. Also, No of moles = Mass / Molar mass
Q: The fat content of 10 g of commercial ice cream was determined by the Mojonnier method. The weights…
A: To calculate the percent of fat extracted during third extraction, we would first need to calculate…
Q: (3) In a titration, the % analyte is computed from the following equation: Vol (titrant) x M…
A:
Q: The concentration of chloride in seawater can be determined by a flow injection analysis. The…
A: To find concentration of Cl- in the sample at an absorbance of 0.443.
Q: A 0.1475-M solution of Ba(OH)2 was used to titrate the acetic acid (60.05 g/mol) in a dilute aqueous…
A: w/v percentage of acetic acid in each of the sample 1 to 4 are required to calculate the mean w/v…
Q: Determine the percentage error and the concentration of the prepared NaOH given the following data.…
A: For NaOH solution , molarity and normality are equal. So first we we would Calculate normality of…
Q: Classify whether the following is an Instrumental error, Method error, Personal error, Indeterminate…
A: Explanation of terms involved Instrumental error occurs when the calibration of an instrument is…
Q: Calculate the 90% confidence limit for the mean of the data assuming that only information about the…
A:
Q: Determine the percentage error and the concentration of the prepared NaOH given the following data.…
A: Given data - NNaOHtrue = 0.045N Weight of KHP = 0.2503g For trial -1Vf NaOH= 25mlVi NaOH = 0mlFor…
Q: A compound X is to be determined by UV/Visible spectrophotometry. A calibration curve is constructed…
A: The light absorbed by the solution is known as absorbance.
Q: A solution of Ba (OH), was standardized against 0.1208 g of primary-standard-grade benzoic acid,…
A: Given 0.1208 g of benzoic acid, volume of base = 43.94g We have to find molar concentration of base…
Q: A volume of 250 ml of a 0.05 M solution of a reagent of formula weight (relative molecular mass) 40…
A:
Q: 1. You wish to determine the %concentration of a stock solution of brilliant blue FCF…
A: Let's say that the molar concentration of stock solution be 'X M'.
Q: For EACH type of gravimetric analysis: Give actual applications of each analysis. Include the…
A: Gravimetric analysis: It is a quantitative analytical method that is based upon the measurement of…
Q: Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by…
A:
Q: Explain two separation techniques how may be feasible for H2O vs Ethanol. One can be an industrial…
A: Separating alcohol from water may be done in a number of different ways. Heating the mixed liquid is…
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: The ratio of the number of atoms of the isotopes 69Ga and 71Ga in eight samples from different…
A:
Q: The determination of copper in a sca water sample gave a mean value of 77.81 ug/L and a standard…
A:
Q: Using a 10mL pipette, you prepare a standard solution by pipetting 10.00mL of the standard iron…
A: A particular pipette has an approximate tolerance or uncertainty value. Based on these uncertainty…
Q: Table 4. Calculations for standardization of sodium hyroxide Trial 1 Trial 2 Trial 3 [1] Tared mass…
A: We have to find the molarity of NaOH using moles of KHP
Q: The concentration of chloride in seawater can be determined by a flow injection analysis. The…
A: We are given Cl- concentration and absorbance data for calibration standards. We have to find Cl-…
Q: Which of the following would result in an increase in the calculated ngas 10, assuming the rest of…
A: Number of moles is defined as the mass of the compound divided by the molar mass of the compound.
Q: Styles Part I: Separation of Ammonium Chloride Mass of small evaporating dish Mass of small…
A:
Q: A titrimetric method for the determination of calcium in limestone was tested by analysis of an NIST…
A: The confidence interval can be calculated using the following formula:
Q: A 0.1475-M solution of Ba(OH)2 was used to titrate the acetic acid (60.05 g/mol) in a dilute aqueous…
A: In order to find the mean w/v percentage of acetic acid in the sample. we have to find the w/v…
Q: In the Analytical Chemistry laboratory, one of the B.Sc student Ms. Fatma wanted to analyze the…
A: Spectrophotometer
Q: A certified reference material of lead in calcium carbonate is analyzed by a laboratory and found to…
A:
Q: 5.00 mL of stock solution is diluted to 25.00 mL, producing solution ALPHA. 10.00 mL of solution…
A: Dilution factor refers to the ratio of initial volume of the concentrated solution to the final…
Q: An environmental chemist working for the Environmental Protection Agency (EPA) was directed to…
A:
Q: A sample is analyzed for chloride using the Volhard method. What is the percentage chloride as NaCl…
A: Given, Weight of sample: 303.0 mg AgNO3 used: 40.00 mL of 0.1234 M KSCN used: 12.20 mL of 0.0930 M…
Q: 1. Develop a detailed separation scheme for the separation and determination of the percent…
A: A mixture is a combination of two or more individual substances that may have uniform composition or…
Q: Identify the effect of the condition on the indicated parameter. Write increase, decrease, or no…
A: Given that in the calculation part, we have used the right concentration value of NaOH, whereas the…
Q: replicate determination of the lead content of a blood sample (0.752, 0.756, 0.752, 0.751 and 0.760…
A:
Q: 1. A student performed this experiment and obtained the following concentration values: 0.02813 M,…
A: As per our guidelines we can only solve first question. Please resubmit other questions as next…
Q: Given the following data, determine the % relative error if the true concentration of NazSO4 is…
A:
Q: standard deviation of concentration (g/mL)
A: Given information: X= cesium iodide
Q: The homogeneity of the chloride level in a water sample from a lake was tested by analyzing portions…
A: Solution -
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: A certified reference material of lead in calcium carbonate is analyzed by a laboratory and found to…
A:
Q: reparation of 0.25N NaOH Objective: Apparatus and Materials: Procedure : Calculate the exact mass…
A: 0.25N NaOH 1 litre N stands for normality To prepare normal solution, we take gram equivalent weight…
Step by step
Solved in 2 steps with 3 images
- A 0.1475-M solution of Ba(OH)2 was used to titrate the acetic acid (60.05 g/mol) in a dilute aqueous solution. The following results were obtained. (See attached image)(a) Calculate the mean w/v percentage of acetic acid in the sample.(b) Calculate the standard deviation for the results. (Take note if n-1 should be used)(c) Calculate the 90% confidence interval for the mean.(d) (d) At the 90% confidence level, could any of the results be discarded?The ratio of the number of atoms of the isotopes 69Ga and 71Ga in eight samples from different sources was measured in an effort to understand differences in reported values of the atomic mass of gallium: Sample 69Ga/71Ga Sample 69Ga/71Ga1 1.526 60 5 1.528 942 1.529 74 6 1.528 043 1.525 92 7 1.526 854 1.527 31 8 1.527 93 Find the (a) mean, (b) standard deviation, (c) variance, and (d) stan-dard deviation of the mean. (e) Write the mean and standard deviation together with an appropriate number of significant digitsA volume of 250 ml of a 0.05 M solution of a reagent of formula weight (relative molecular mass) 40 was made up, the weighing being done by difference. The standard deviation of each weighing was 0.0001 g. 1 (a) What were the standard deviation and relative standard deviation of the weight of reagent used?
- Before determining the amount of Na2CO3 in an unknown sample, a student decides to check her procedure by analyzing a sample known to contain 98.76% w/w Na2CO3. Five replicate determinations of the %w/w Na2CO3 in the standard were made with the following results 98.71% 98.59% 98.62% 98.44% 98.58% Is the mean for these five trials significantly different from the accepted value at the 95% confidence level (α = 0.05)A 0.1475-M solution of Ba(OH)2 was used to titrate the acetic acid (60.05 g/mol) in a dilute aqueous solution. The following results were obtained. (See attached image)(a) Calculate the mean w/v percentage of acetic acid in the sample.(b) Calculate the standard deviation for the results.(c) Calculate the 90% confidence interval for the mean.(d) (d) At the 90% confidence level, could any of the results be discarded?Q) water hardness of each trial and average ppm with calculation, please. Hard Water Trial 1 Hard Water Trial 2 Hard Water Trial 3 Initial Syringe Reading 1.0ml 1.0ml 1.0ml Final Syringe Reading 0.88ml 0.84ml 0.85ml Volume of EDTA Consumed 0.12ml 0.16ml 0.15ml Water Hardness ppm CaCO3 Average ppm
- In quality management, it is very important that you have a good background knowledge in both descriptive and inferential statistics. Since you already took up Biostatistics and Epidemiology during your Second Year, answer BRIEFLY the following questions on basic statistics: 1. Compare and contrast the three most common measures of central tendency mean, median and mode. 2. Differentiate standard deviation from coefficient of variation. 3. What is T-test?In the determination of ethanol concentration in alcoholic beverages using the GCFID method, why do we need to calculate the coefficient variation (CV). standard deviation, repeatability, response factor and response ratio? And how to calculate this parameter?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 relative standard deviation and coefficient of variation of this set of data
- Here is a use objective for a chemical analysis to be performed at a drinking water purification plant: “Data and results collected quarterly shall be used to determine whether the concentrations of haloacetates in the treated water demonstrate compliance with the levels set by the Stage 1 Disinfection By-products Rule using Method 552.2” (a specification that sets precision, accuracy, and other requirements). Which one of the following questions best summarizes the meaning of the use objective?(i) Are haloacetate concentrations known within specified precision and accuracy?(ii) Are any haloacetates detectable in the water?(iii) Do any haloacetate concentrations exceed the regulatory limit?The concentration of purified OXA-M290 is tested with a BCA assay. Serial dilutions of a bovine serum albumin (BSA) stock solution are prepared, then pipetted into a 96-well plate; each dilution of the BSA standard is tested in triplicate. Then, bicinchoninic acid and Cu2+ ions are added to all of the wells of the plate. After incubating the plate for 1 hour, a microplate reader is used to measure the absorbance of all of the wells in the plate at 560 nm. This generates the following data: BSA conc. (μg/mL), Replicate 1 Absorbance, Replicate 2 Absorbance, Replicate 3 Absorbance 40, 1.360, 1.403, 1.481 20, 0.750, 0.745, 0.810 10, 0.380, 0.344, 0.398 5, 0.198, 0.160, 0.183 2.5, 0.090, 0.100, 0.085 1.25, 0.038, 0.043, 0.051 0.625, 0.024, 0.028, 0.019 Prepare a calibration curve using these data. You can use Excel, R, SPSS or an equivalent graphing software. In this graph, plot absorbance (y-axis) against the concentration of the protein standard (x-axis). Calculate and plot…If an instrument gives a response of 1240 for a standard containing 8 ppm of a substance, how much if this substance is in a sample that gives a response of 1705? Are any assumptions needed?