What do you call the type of analytical method that relies on the absolute stoichiometric equivalences of balanced chemical reactions in order to compute the amount of analyte present in the sample? A Instrumental methods B Classical methods Oxidative methods D Blank Correction Methods
Q: Which of the following glassware is best used for slow dispensing of 47.00 mL of a solution?
A: Different experiment have different requirement
Q: Which of the following should NOT be done in case of a large acid spill? A After wiping the spill wi...
A: Discuss the things which have done in the acid spills and check which one is not suitable to do afte...
Q: We perform a 1.0 mL 2-methyl-2-butanol alcohol dehydration by simple distillation also using H2SO4. ...
A: A question based on analytical separations that is to be accomplished.
Q: Question Completion Status: QUESTION 2 Match the hydrogens on the structure below to the appropriate...
A:
Q: The reaction between selenous acid and the iodide ion in acid solution is H2SEO3(aq) + 61 (aq) + 4H*...
A:
Q: You were assigned by your instructor to determine the concentration of NaCl in water. You did three ...
A:
Q: А. :o: В. :O: C. H B.
A:
Q: How many H atoms are present in 8.3 g of H 2 ? O a. 2.5 x 1024 atoms O b.6.02 x 1023 atoms O c. 10.0...
A: Given Mass = 8.3 g
Q: When 6 moles of H₂ reacted with 3 moles of N₂ to produce, NH₃, which is the limiting reactant? *
A: Answer: In chemical reaction, limiting reagent is the reactant that exhausted first and decided the ...
Q: Francis A. Santos Which of the following is not a way of expressing data reliability: A Statistical ...
A: A question based on tools in analytical chemistry that is to be accomplished.
Q: e equilibrium constant
A:
Q: How many grams of CuCl2 (MW = 134.45 g/mol) is needed to prepare 100.0 mL of 0.2418 M CuCl2? 3.07...
A:
Q: What is the Kohlrausch plot of a weak acid? 1 2 O 2
A: Kohlrausch's law is used to calculate molar conductance of weak acid by graphical methods. It has t...
Q: Which of the following is not a way of expressing data reliability: Statistical Tests Sampling...
A: A question based on tools in analytical chemistry that is to be accomplished.
Q: Question 30 At 3000 K, the partial pressures of Co2, co and 02 are 0.6, 0.4 and 0.2 atm, respectivel...
A:
Q: 4. Write the Molecular, Complete lonic and Net lonic equations for following reaction. Ammonium brom...
A: (4) Given that - Ammonium bromide and lead (II) nitrate react to form lead (II) bromide and ammoniu...
Q: Compute for the volume (in mL) of 0.1 M acetic acid and mass (in g) of sodium acetate needed to prep...
A: A buffer solution is formed by the mixing of a weak acid with its conjugate acid or the mixing of a ...
Q: Can the fluorine ion stabilize a carbanion? Why or why not.
A: In the given problem We have to describe the inductive effect of fluorine.
Q: Arrange the following in order of highest to lowest concentration of OH ions, i.e., the most basic t...
A:
Q: Vanillin is being reduced to vanillyl alcohol. The chemicals involved in this reaction are: vanillin...
A: Synthesis of vanillyl alcohol from Vanillin Vanillin is a phenolic aldehyde and it has three functio...
Q: Vhich of the following does NOT exhibit a safe laboratory practice? A Gloves are not removed when go...
A: The options given are,
Q: 1. Compute the formula mass/molecular mass of, A. Carbon Dioxide i. Compute the number of moles in 5...
A: Given, Compute the formula mass/molecular mass of (A). Carbon Dioxide i. Compute the number of mole...
Q: Lewis structures of molecules compounds. Recall the rules in drawing a Lewis structure anduse them t...
A: Rules to draw Lewis structure: - Find the total valency electrons of the molecule. - Choose central ...
Q: Determine the mass of carbon in a 52.5 g sample of isopropyl alcohol given the percent of C is 59.96...
A: Given, mass of sample = 52.5 g Mass of Carbon = ?
Q: Question 5 Which of the following statement/s is/are TRUE? I. Electrochemistry deals with the physic...
A:
Q: A student was required to prepare 250.0 mL of a cyanoacetic acid/sodium cyanoacetate buffer in which...
A: Given: Volume of buffer = 250.0 mL. Concentration of weak acid available = 0.51 M Concentration of N...
Q: concentration equilibrium constam
A:
Q: (A) What are the approximate bond angles marked 1, 2, and 3? (B) What are the hybridization of the c...
A: Bond angles are depends on hybridization and presence of lone pair of electrons on the central atom ...
Q: How many significant figures does the difference 218.7201 – 218.63 contain?
A: For calculation of difference between two numbers, answer should be in least number of decimal numbe...
Q: ete chemical formula for t
A:
Q: The amount of substance formed or consumed at the electrodes is proportional to the quantity of elec...
A: Faraday's law - It states that the induced voltage in circuit is proportional to the rate of cha...
Q: Report predicted pKa, observed pKa and percent error from graph please if you could please explain :...
A: To report predicted pKa, observed pKa and percent error from the graph.
Q: Which of the following pairs is correctly matched? A. beaker: measures volume of liquids B. spatula:...
A: In chemistry laboratory different types of equipments are used. Every equipment have it's own use. ...
Q: Name of Experiment: Fluorescence Spectroscopy Q1: Purpose of experiment 02: Inttroduction
A: Experiment Name - Fluorescence Spectroscopy 1) purpose of Experiment - It is a widely accepted an...
Q: Draw the lewis structure of the compound BiAt3 and show its molecular geometry.
A: Lewis’s structure: Lewis’s bonding theory is based on the octet rule. The Lewis structure is a simpl...
Q: n aqueous solution of potassium hydroxide is standardized by titration with a 0.178 M solution of hy...
A: Molarity is defined as number of moles of solute divide by volume of solution
Q: The Gibbs Free Energy, Enthalpy, and Entropy are state functions; hence, path-dependent. True Fa...
A: State functions are those functions which depends on initial and final state of the substance.
Q: Use Grubbs test to decide if the maximum value is an outlier.
A: Ans: option 4 Normal probability plot of mass spectrometry measurements
Q: a. Rank the following in order from most effective to least effective oxidizing agents under standar...
A:
Q: Which of the following pairs is correctly matched? A hotplate : supplies flame B beaker : measures v...
A: The options given are,
Q: When 17.9 grams of aluminum are reacted with 86.8 grams of chlorine, how many grams of excess reacta...
A: Mass of Aluminium = 17.9 grams. Mass of chlorine = 86.8 grams. Mass of excess reagent remains = ?
Q: Which kind of solvents are suitable for experiments involving spectroscopic analyses? (A Spectroscop...
A: In Spectroscopy, solvents play crucial role. In this technique ,solvents have to be 100 % pure,and s...
Q: Which of the following statement/s is/are TRUE? 1. The 9-V battery drives the non-spontaneous reacti...
A: Given, Four statement regarding electrolysis is provided Required, Select the T...
Q: 3 8 10 11 12 13 14 Liquid octane (CH; (CH,),CH3) will react with gaseous oxygen (0,) to produce gase...
A:
Q: The hydrogen oxalate ion HC,O," is amphoteric. Show how this is so by completing the following equil...
A: A question based on equilibrium concept that is to be accomplished.
Q: WHICH OF THE FOLLOWNG PHYSICAL PROCESSES IS EXOTHERMIC? A. BOILING OF WATER B. MELTING OF ICE C.E...
A: WHICH OF THE FOLLOWNG PHYSICAL PROCESSES IS EXOTHERMIC? BOILING OF WATER, MELTING OF ICE EVAPORATI...
Q: Dtermine the formal charge of N and the number of lone pairs present.
A:
Q: 22.00 g sample of nitric acid (HNO3) has a purity of 96.20% by mass. Calculate the following: the ...
A:
Q: Based on the given structures, determine which has a higher boiling point and why?
A: Boiling point is directly proportional to molar mass and inversely proportional to branching
Q: What is the correct way of dealing with acid spills? (A Neutralize with a basic solution before wipi...
A: Concentration acids are highly dangerous and can cause damage to skin when in contact.
Step by step
Solved in 2 steps
- Which method of analysis generally is the faster method, gravimetric or volumetric? Why is that?What do you call the type of analytical method that relies on the absolute stoichiometric equivalences of balanced chemical reactions in order to compute the amount of analyte present in the sample? Oxidative methods Instrumental methods Classical methods Blank Correction MethodsBecause of the risk of lead poisoning, the exposure of children to lead-based paint is a significant public health concern. Thefirst step in the quantitative analysis of lead in dried paint chips is to dissolve the sample. Corl evaluated several dissolution techniques.24 In this study, samples of paint were collected and pulverized with a Pyrex mortar and pestle. Replicate portions of the powdered paint were then taken foranalysis. Results for an unknown paint sample and for a standard reference material, in which dissolution wasaccomplished by a 4–6-h digestion with HNO3 on a hot plate, are shown in the following table. (a) Determine the overall variance, the variance due to the method, and the variance due to sampling. (b) What percentage of the overall variance is due to sampling? (c) How might the variance due to sampling be decreased?
- 00 mL of a diprotic acid primary standard solution was accurately prepared to a concentration of 0.1431 M. Three samples of this primary standard solution were used as samples in a titration to standardize an aqueous solution of sodium hydroxide, NaOH, which would be used as a titrant. Using the following table of data for the titration of the primary standard acid with NaOH, calculate the average concentration of NaOH. Trial # Volume of primary standard Initial titrant volume Final titrant volume 1 10.00 mL 8.21 mL 27.22 mL 2 10.00 mL 27.22 mL 46.23 mL 3 10.00 mL 30.28 mL 49.29 mL 0.1506 M 0.0753 M 0.0376 M 0.1431 M 0.0526 MIn the Analytical Chemistry laboratory, one of the B.Sc student Ms. Fatma wanted to analyze the presence of Iron(II) ion in the water samples collected from Sohar Industrial Area in the Sultanate of Oman and analyzed by Spectrophotometric method. (1) 250.00 mL of this water sample (Solution A) known to contain unknown amount of FeSO4. She has diluted Solution A by a dilution factor 10 to make 250.00 mL solution, which she labeled Solution B. Using Spectrophotometer, she has measured the absorbance value (0.642) for Solution B at 508 nm using 1.00 cm cell (cuvet). The molar absorptivity value for Fe2* ion at 508 nm is ɛ508 = 30.8 M-1cm1. (i) What volume of the solution A did she require to make the 250.00 mL of Solution В? (ii) in (i)? What instrument should she use to transfer the volume of the Solution A calculated (ii) Concentration of FeSO4 in Solution B. (iv) Concentration of FeSO4 in Solution A. Mass of FeSO4 in Solution A (Show your calculation) (v)All of the following criteria must be met for a titrimetric analysis to be feasible EXCEPT: Select one: a. Reaction between the standard and analyte must be known. b. There should be a substance for endpoint detection c. Reaction must proceed quantitatively to completion. d. Reaction between the reactants must be slow.
- THE QUESTION IS AT THE PICTURE... 2 QUESTIONS ONLY.. AND THE GIVEN PROBLEMS IS THE ONE I TYPED............. PLEASE TYPE YOUR ANSWER PLEASE....A. Concentration1. Place 3 mL each of 6N, 3N, & 1.5N hydrochloric acid in separate test tubes.2. Drop simultaneously equal lengths (about 1cm) of magnesium ribbon and note thetime it takes for the magnesium to dissolve in each use.B. Surface Area1. Weigh a small iron nail to the nearest hundredths of a gram and weigh an equalamount of iron fillings.2. Place them in a separate test tubes.3. Add simultaneously 3 mL of 3N hydrochloric acid and compare the rates of reaction.C. Temperature1. Place 5 mL each of 0.1N sodium thiosulfate solution into 5 test tubes.2. Place all five test tubes in the water bath and let it stand for 1 minute.3. Record the temperature of the water bath. Remove the first test tube from thewater bath and place it in the test tube rack.4. Add 1 mL of 0.1M sulfuric acid and stir with a glass rod. Record the time it takes…THE QUESTION IS AT THE PICTURE... 2 QUESTIONS ONLY.. AND THE GIVEN PROBLEMS IS THE ONE I TYPED........ATTACHED PHOTO IS MY ANSWER BUT PLEASE CORRECT ME IF I AM WRONGA. Concentration1. Place 3 mL each of 6N, 3N, & 1.5N hydrochloric acid in separate test tubes.2. Drop simultaneously equal lengths (about 1cm) of magnesium ribbon and note thetime it takes for the magnesium to dissolve in each use.B. Surface Area1. Weigh a small iron nail to the nearest hundredths of a gram and weigh an equalamount of iron fillings.2. Place them in a separate test tubes.3. Add simultaneously 3 mL of 3N hydrochloric acid and compare the rates of reaction.C. Temperature1. Place 5 mL each of 0.1N sodium thiosulfate solution into 5 test tubes.2. Place all five test tubes in the water bath and let it stand for 1 minute.3. Record the temperature of the water bath. Remove the first test tube from thewater bath and place it in the test tube rack.4. Add 1 mL of 0.1M sulfuric acid and stir with a glass rod.…For EACH type of gravimetric analysis:Give actual applications of each analysis. Include the SPECIFIC methodology for each sample chosen.
- When we make a calibration curve, we want the range of calibration standards to the analyte concentrations in the samples. If this is not the case, we will have to the samples, depending on the analyte concentration. O Exclude, concentrate or dilute O Include, spike O Include, concentrate or dilute None of These O Exclude, calculate the concentration of You have prepared a set of calibration standards for nitrate in surface water where you are using Beer's Law to generate the calibration curve. The calibration equation for the standards you have prepared between 1 and 15 ppm is y = 0.0820x +0.00900. You analyze a 3.00 mL water sample and generate an absorbance response of 1.12. You report the concentration of nitrate in this sample as: O None of These O 4.52 ppm O The concentration is out of range so it cannot be reported O 13.5 ppm O 13.5 absorbanceIntroductlon In Part (a) of this experiment you will prepare a primary standard. Potassium hydrogen phthalate (KHP) is a monoprotic acid with the formula KHC,H.O. In this experiment KHP is used as the primary standard. A standard solution is one whose solute concentration is accurately known. If a solute can be obtained in a very pure, stable, weighable form, a primary standard solution of it can be prepared directly. You will then use the standardized sodium hydroxide solution to determine the acetic acid content of a dilute unknown solution. Procedure (0) Preparation of a Primory Standard Potassium hydrogen phthalate (KHP) is a primary standard. Weigh accurately by difference, approximately 0.8 g of KHP in a clean, dry weighing bottle and transfer it into a 250 ml conical flask. Add 75 ml of distilled water. Swirl gently. Cover the flask and leave to dissolve, swirling periodicaly. Cautlon: KHP is not highly soluble and care must be taken to ensure it is all dissolved before you…What do you call the type of analytical method that relies on the absolute stoichiometric equivalences of balanced chemical reactions in order to compute the amount of analyte present in the sample? a.Oxidative methods b.Classical methods c. Blank Correction Methods d. Instrumental methods