Explain what will happen to the (i) yield and (ii) purity, of aspirin if the following steps were modified in its synthesis Modification in Step Yield Explanation Opting to filter the recrystallized product using only gravity filtration
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- H1 gramof Sampleof an impure mixture af NARCOZ and Natteo, containing impurties is dissalved and tityated with SN Hel wit p colourless after addition5mD otacid-Methyt ge is then added and 22ontof, acid reguired orange tochange the of Naz coz benotphthalein as indicator, the sotudion Curns this indicator what is the percoulye and Na Heoz in the sample ?tebrite a letence equation between HInd Bac012 in Solution with physical HANDWRITIEN states. GIVE EXPLAINED ANSWERA sample of Al;(SO.); weighing 7.52-g was dissolved in enough water and diluted to 250.0-mL. 100.0-mL of the dilution was transferred to another flask, 10.0-mL of 0.050M EDTA, 20-ml of buffer solution, 50-mL of alcohol and 2.0-ml dithizone TS were added. The resulting solution required 8.7-mL of 0.031M ZnSO, to reach the endpoint. (Note: Each ml of 0.050M EDTA is equivalent to 16.66-mg Al:(SO.);•18H;0). Compute for the percent purity of the sample.
- The equilibrium for the vorious proportions of the dissociation of the liquid solutions of amyl ester of dichloroacetic ccid (CHCI,.COOC,H,} into the acid (CHCLCOOH) and amylene (C,H was investigated. The inltial amount tor the CHCI,COOC.H used Is 1 mole. Completethe table below Let b the inltial moles of omylene, V the totdl volume cof mixtures in iters, x. be the number of moles of V. 1.05 0.215 0.455 3.12 .af equibrium ond Kc ester outionum constont n.moles per iter. 2.61 0.401 4.45 0.628 3.54 0.794 0.658 3.44A saturated Na₂CO₃ solution isprepared, and a small excess of solid ispresent (white pile in beaker). A seedcrystal of Na₂ ¹⁴CO₃(¹⁴C is a radioac-tive isotope of ¹²C) is added (small redpiece), and the radioactivity is mea-sured over time. (a) Would you expectradioactivity in the solution? Explain.(b) Would you expect radioactivity inall the solid or just in the seed crystal? Explain.A 0.64 g sample containing KCl ( mw = 74.6 ) is dissolved in 50mL of water and titrated to the Ag2CrO4 end point, requiring 26.2 mL of 0.15 M AgNO3 .The %w/w KCl in the sample is ?
- ) tecno Al CAMERA Nitrogen in organic Compunds is tested by the addition of few drops of Saturated ironCii) Sulphae Solution to a Small Portion of Sodiem filein filtrate. Dilute hydregen tetmoxosulphate(v) is albso added to the lator Solution Leading to a formatiīon oF prusien blue colour or preaipitate Signalling the presenca Of nitrogen. Shaw these steps Using equations and name your find producton in a 1. 200 Sample was precipi toled as the hdroxide and ignited to Ferm Fez0 (0. 352 1 FW= 159-7 lmal). Fnd %Fe (AW : 55-8 glmal)in the Sample. 4 A 2-560 g of impure CCl, Sample was disselved in water and precipitated wii th excess Na Cou Selution. 1F i.245g CaGOu (FW= 12891ml) was obtained, what is the percentage f Cack (FW= mglmal) in the impure Sample? Cu: A 0-21219 sample of an organic Compound was and the Ce, was burned in a stream of oxygen, and the CO2 was Callected in a solution of BalOH), Caleulate the %C in the Sample if o.co06 g of Ba COg was hamedd (FW Ba CO, = 197.34g mol), (AW C=12 glm)Five drops of dichlorofluorescein have been added to a solution containing 0.800 g sample which required 25.30 mL of 0.100 M AgNO3. (c) Calculate the weight percent NaCl in the original sample.
- (3). Write short notes on displacement titration with suitable example.Example /A0.527g sample of mixture containing NazCO; and NaHCO; and inert impurities phenolphthalein endpoint and a total of 43.8mL to reach the modified methyl orange endpoint, what is the percent each of Na CO3 and NaHCO; in mixture? is titrated with 0.109M HCІ, requiring 15.7mL to reach the Solution:Q2:(5 Marks ):A 0.7650 gm. Of Clay, containing 20% moisture gave precipitate of KCIO. weighting 0.3822 gm., What is the percentage of K;O in the Clay on dry basis?