IAL ERROR ANALYSISAnswer the effect on the results for the following hypothetical cases. Indicate in each table whethereach data point increases (I), decreases (D), or does not change (NC) as a result of the error.the molar mas.code:6. A student does not remove the air bubble from the tip of the burette before standardizing theNAOH solution. How does this mistake affect her recorded results?Haq Na2Aaq..I/D/NCMass of KHC HO, (g)Molar mass of KHC H,O, (g/mol)Moles of KHC,H,O, (mol)Initial level of NaOH (mL)Final level of NaOH (mL)Volume of NaOH used in titration (mL)Moles of NAOH (mol)Your molarity for NaOH (M)OR ANALYSIS

Answered: Image /qna-images/answer/7ac96ade-4585-49cb-8470-3e64f78e3daa.jpg

Answered: 6. A student does not remove the air…

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter3: Statistical Tests With Excel

Section: Chapter Questions

Problem 6P

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A chemist receive different mixtures for analysis with the statement that it contain NaOH, NaHCO3 , Na2CO3 or compatible mixtures of these substances together with the inert material. From the data given, identify the respective materials and calculate the percentage of each component. 1.000g samples and 0.2500 N HCl were used in all cases. Sample 1 With phenolphthalein as the indicator, 24.32 ml of HCl was used. A duplicate sample required 48.64 ml HCl using methyl orange as the indicator. Sample 2. With phenolphthalein as the indicator it uses 28.2 ml of HCl to make it colorless and added with methyl orange indicator and uses 11.3 ml of HCl to reach the end point.
How do I do the calculation(s) here to determine the information I will need to enter/graph in Excel?! (I can do the graph, mainly need help with the (chem-) math). Using the following information, draw the species diagram for the aqueous carbon dioxide bicarbonate ion-carbonate system at 25 °C: [H2CO3] + [HCO3-] + [CO32- ] = C K1 = [HCO3-] [H+] / [H2CO3] K2 = [CO32-] [H+] / [HCO3-]
Submit a clean, dry, and properly labeled 50-mL reagent bottle for your unknown solution. Pipet 20.00 mL of the sample in 250-mL Erlenmeyer flask. Add 5 mL of buffer and 5 drops of indicator. Titrate the solution until it turns light blue. If the titration consumes more than 50 mL of the titrant, dilute the sample accordingly. Compute for ppm of CaCO3 using the following table. Mean Molarity = 2.487 x 10^-3 MBlank correction = 0.015 Formula = V (mL) titrant x Mean Molarity of Titrant x Molecular weight of CaCO3 x 1/V (L) sample
Calculate the gravimetric factor of the following. 2 Fe3O4 is sought(Analyte), 3 Fe2O3 is weighed (Precipitate)
PS. Further values required for the solvings are give in the various situations below. (ANSWER) Situation: A community in a mountainous area of Bohol uses water collected from a nearby natural spring. A sample was submitted to a laboratory for the analysis of its total hardness. Required: SHOW YOUR COMPLETE CALCULATIONS. BASED ON THE IMAGE PROVIDED BELOW FOR THIS QUESTION: Calculate the amount of titrant used in each trial to reach endpoint. Report total hardness of the sample as mean ±sd. a. 250.0 mL of 500.0 ppm of CaCO3 solution from a primary standard (assume solvent is distilled water only). Answer : Mass of CaCO3 = 0.125 g b, The EDTA solution was standardized by titrating it with a 25.0 mL aliquot of the CaCO3 solution. How much of the titrant was consumed. Answer: Volume of EDTA consumed = 12.405 g c. Calculate the average titer (mg CaCO3/mL EDTA). Mass of CaCO3 in 25 mL CaCO3 solution: 0.0125 g Answer: 1.008 mg CaCO3/ mL EDTA
A commercial vinegar was analyzed by titration to determine the percent acetic acid. Briefly, 10.00 mL of vinegar sample was diluted to 100. mL solution in a volumetric flask. A 25.00 mL aliquot from the diluted vinegar required 25.55 mL of 0.1005 M sodium hydroxide to reach the phenolphthalein endpoint From this experiment which is the standard solution used in titration? CH3COOH NaOH NaCH3COO C20H14O4
Given the volume of 0.4810 M NaOH used determine the concentration of 19 ml sample each from aquaeous layer (Aq) and benzene layer (Or). To reach the end point of Aquqeous layer and organic layer 14.79 ml and 14.18 ml of NaOH used respectively using Phenolppthalein indicator. What will be the Kd of the system.
A student dissolved 20 mg of caffeine in 20 mL of water. The student carried out two extractions using 20 mL of dichloromethane in each one. Caffeine solubility in water: 2.17 g / 100 mL at 25 ° C Caffeine solubility in dichloromethane: 10.0 g / 100 mL at 25 ° C Present the calculations in detail below. A. Determine the distribution coefficient. b. Determine the amount of caffeine obtained in the first extraction. C. Determine the amount of caffeine obtained in the second extraction. 77 D. Determine the total amount of caffeine extracted during the entire process. and E.Determine the percent recovery.
In which situation(s) is it necessary to use a volumetric flask for maximum accuracy? to prepare a 0.150M solution of sodium chloride to measure ~25mL of water to prepare 0.1M HCI from 36-38% HCI a and c all of the above (Please type answer no write by hend)
Prepare 250 mL stock acetic acid solutions and from this solution prepare 100 mL of eachstandard solutions (you have pippette with sensitivity of 0.1 mL). (0.015 M 0.030 M 0.060 M 0.090M 0.12 M 0.15 M)
Compute for the numerical value of the gravimetric factor required to convert the given precipitate into the desired analyte. 1. Magnesium ammonium phosphate (MgNH4PO4) precipitate into phosphorous (as diphosphorous pentoxide, P2O5). 2. Magnesium ammonium phosphate hexahydrate (MgNH4PO4.6H2O) precipitate into nitrogen.
Given the following data and the λmax determined in the previous questions, determine:1) the molar absorptivity of copper at λmax of cobalt 2) the molar absorptivity of copper at λmax of copper 3) the molar absorptivity of cobalt at λmax of cobalt 4) the molar absorptivity of copper at λmax of cobalt 5) the concentration of cobalt in mM 6) the concentration of copper in mM Copper concentration, mM λmax cobalt λmax copper 20.00 0.177 0.238 40.00 0.382 0.487 60.00 0.518 0.731 80.00 0.765 1.134 100.00 0.902 1.391 Cobalt concentration, mM λmax cobalt λmax copper 20.00 0.186 0.163 40.00 0.412 0.354 60.00 0.637 0.477 80.00 0.754 0.694 100.00 0.961 0.831 unknown, Abs at λmax cobalt 0.893 unknown, Abs at λmax copper 0.997

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