4 Table LC.3: Equilibrium Response for Iron Thiocyanate ReactionAnalysis of equilibrium response to various stressorsTest tube 1: ReferenceTest tube 2: Added KSCN(aq)Test tube 3: Added Fe(NO3)3(aq)Test tube 4: Added NaF(s)Test tube 5: Hot water bathTest tube 6: Ice bathNormalBIUColor observationBEEfx Deorangemore red/brown than referencemore red/brown than referenceless red/brown than referenceless red/brown than referencemore red/brown than referenceTable view List viewBETEReaction responseChooseTowards products -1. For test tubes 2 through 6, explain how each change affected the equilibrium in terms how each change affected the value of Qc or Ke and how this is consistent withyour observation.ChooseTowards products -For Tubes 2, 3 and 4 include in your analysis what happens chemically when each reagent is added. State the direction in which the equilibrium shifts and relate how thechange in solution color supports your conclusions.ChooseTowards reactants -ChooseTowards reactants -ChooseTowards productsTx

This question can be answered on the basis of Le Chatelier's principle which states that if a…

Table LC.3: Equilibrium Response for Iron Thiocyanate Reaction Analysis of equilibrium response to various stressors Test tube 1: Reference Test tube 2: Added KSCN(aq) Test tube 3: Added Fe(NO3)3(aq) Test tube 4: Added NaF(s) Test tube 5: Hot water bath Test tube 6: Ice bath Normal A D Color observation T " Y 82 orange more red/brown than reference more red/brown than reference less red/brown than reference less red/brown than reference more red/brown than reference Table view 1 List view Reaction response 1. For test tubes 2 through 6, explain how each change affected the equilibrium in terms how each change affected the value of Qe or Ke and how this is consistent with your observation. Choose Towards products For Tubes 2, 3 and 4 include in your analysis what happens chemically when each reagent is added. State the direction in which the equilibrium shifts and relate how the change in solution color supports your conclusions. Choose Towards products Choose Towards reactants - Choose Towards reactants - Choose Towards products I

Table LC.3: Equilibrium Response for Iron Thiocyanate Reaction Analysis of equilibrium response to various stressors Test tube 1: Reference Test tube 2: Added KSCN(aq) Test tube 3: Added Fe(NO3)3(aq) Test tube 4: Added NaF(s) Test tube 5: Hot water bath Test tube 6: Ice bath Normal A D Color observation T " Y 82 orange more red/brown than reference more red/brown than reference less red/brown than reference less red/brown than reference more red/brown than reference Table view 1 List view Reaction response 1. For test tubes 2 through 6, explain how each change affected the equilibrium in terms how each change affected the value of Qe or Ke and how this is consistent with your observation. Choose Towards products For Tubes 2, 3 and 4 include in your analysis what happens chemically when each reagent is added. State the direction in which the equilibrium shifts and relate how the change in solution color supports your conclusions. Choose Towards products Choose Towards reactants - Choose Towards reactants - Choose Towards products I

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter12: Spectrochemical Methods

Section: Chapter Questions

Problem 7P

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Cinnamon is made up of a mixture of many compounds. Cinnamaldehyde is the component responsible for cinnamon flavor. Several of these compounds are also a potent antimicrobial compounds present in essential oils. The following results were obtained for known concentrations of three of the compounds. Concentration (mg sample/200 uL) Cinnamaldehyde Eugenol Thymol 0.50 0.4 0.65 1.8 0.75 1.0 0.8 1.10 1.2 1.25 2.0 1.30 3.0 1.50 1.5 1.90 3.1 2.0 4.6 2.50 4.0 5.8 Determine the calibration curve equations for each component including regression. which component has the highest calibration sensitivity? A sample containing the three essential oils in part b gave the peak areas relative to the internal standard of cinnamaldehyde 2.6, eugenol 0.9 and thymol 3.8. Determine the concentration of each of the oils in the sample and the standard deviations.
(9.29 × 105/8)-20.81 = with correct sig figs
Provide a flowchart (containing added reagents + possible ions) and/or a brief explanation. CATION CONFIRMATORY TESTS ADDED REAGENT(S) OBSERVATIONS KSCN Blood red complex K4Fe(CN)6 Prussian blue ppt K3Fe(CN)6 NVR Na2C2O4 NVR NaOH (in evaporating dish) NVR ANION CONFIRMATORY TESTS ADDED REAGENT(S) OBSERVATIONS (to the ppt) CH3COOH NVR MgCl2 NVR 6M H2SO4, FeSO4, 18M H2SO4 Brown ring POSSIBLE ION(S) PRESENT? Select one or more: Fe3+ SO42- I- Zn2+ Cu2+ PO43- Ca2+ CO32- SCN- Br- NO3- NH4+
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Taking Ka for acidic acid as 1.8 x 10-5, calculate H3O+ , using the known concentraions of acidic acid and soudium acecate contained in reaction mixtures 1 and 4. Reaction mixture time (s) Acidic acid concentration (mol/L) sodium acetate concentration (mol/L) calculated H3O+ concentration 1 237 0 1 x 10 -5 4 236 1 x 10 -4 1 x 10 -5
How will mistakenly using solution 1 to calibrate the spectrophotometer, instead of the blank affect the calcualted concentration of FESCN2+ at equilibrium and the calculated concentrations of Fe3+ and SCN- uncomplexed at equilibrium? The blank contained 5.00mL of 0.00200 M Fe(NO3)3 (in 0.1M HNO3) and 5.00mL of 0.1 M HNO3. Solution 1 contained 5.00mL of Fe(NO3)3 (in 0.1M HNO3), 1.00mL of 0.00200 M NaSCN (in 0.1 M HNO3) and 4.00mL 0.1M HNO3. Fe3+(aq)+SCN-(aq)->FeSCN2+(aq)
Ali has measured the oxidative stability of palm oil sample under accelerated storage condition at 60*C for 6 days The following data were recorded for the peroxide value and p anisidine value of the palm oil after 5 days of storage time: Sample weight 1.0030 g Concentration of NazSzO3 = 0.001 N Volume of NazSzO3 titrated for sample solution = 1.35 ml Volume of NazSzO3 titrated for blank solution 0.20 ml Absorbance for sample solution = 0.907 Absorbance for blank solution 0.203 Calculate: i) peroxide value ii) p-anisidine value iii) TOTOX value
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For a tungsten carbene (catalyst) binding to THF (ligand) at 25 oC in per-deuterotoluene solvent, the chemical shift of the unbound catalyst alpha hydrogen was determined to be 794.6 Hz and the peak for the fully bound catalyst alpha hydrogen was observed at 842.4 Hz. Furthermore, the binding constant (or formation constant) Kf was found to be 15.40 M-1. Given the following initial concentrations of catalyst and ligand, calculate the percent THF bound you would expect to see at 25 oC. Record your answer to the nearest tenths of a percent, as a number with no units (Ex. 3.4% ----> enter "3.4") Co = 1.000 M Lo = 0.1000 M
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Please write and show the balanced chemical reactions (on the upper part (above letter A) and under determination of the concentration EDTA solution). Hint: Experimental Procedure: A. Preparation of 0.01M EDTA solution Transfer about 2-g of disodium dihydrogen EDTA dihydrate and 0.1-g of MgCl2•6H2O into a clean 400-mL beaker and dissolve the solids in water. If the solution appears turbid, add NaOH solution until the solution is clear. Transfer the solution into an amber bottle, add enough distilled water to make about 0.500 L and mix thoroughly. Label the contents of the bottle as 0.01 M EDTA. B. Standardization of 0.01M EDTA solution using CaCO3 as Primary Standard You should prepare the Ca2+ standard solution as follows: accurately weigh about 0.2-0.4-g of primary standard CaCO3 that has been previously dried at 100oC. Transfer the solid to a 250-ml volumetric flask, using about 100-mL water. Slowly add 1:1 HCl dropwise until effervescence ceases and the solution is clear.…