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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 ?A 4.912-g sample of a petroleum product was burnedin a tube furnace, and the SO2produced was collectedin 3% H2O2.Reaction:SO2(g)+H2O2→H2SO4A 25.00-mL portion of 0.00873 M NaOH was introducedinto the solution of H2SO4, following whichthe excess base was back-titrated with 15.17 mL of0.01102 M HCl. Calculate the sulfur concentrationin the sample in parts per million.A Sample Containfng mmol of KNOS is "parsed 6.00 x10-2² mmol of vesay ad z.00x102 mmol af ves@y ad 2.00x1o2 though a cation -excharye Column. the Colculate. volume o.02.00 M NaH of needed to titrete the elwate,
- To analyze an aspirin sample, 0.3470 g of crushed tablets are weighed and treated with 50.00 mL 0.1155 M sodium hydroxide, boiling for 10 minutes. Under these conditions the acid acetylsalicylic (MW, 180) reacts according to: CH3COO-C6H4-COOH + 2 OH- → OH-C6H4-COO- + CH3COO- The excess NaOH is then titrated with 11.5 mL of 0.2100 M HCl. What is the purity of said show ?.2 N, Og g) - 2. The istandaed gibbs yece enetgy chenge KT/mot Change $2 thins čcaction is -29.0 what is the value ef gibis eee ehetg 350 K when %3D 0-602. M, [No, ] %3D O. 021How to prepare 250cm3 of a solution of carbonate with concentration 0.100 mol dm-3
- Q1) A sada- Lime Sample is 90% NaoH and 10% CaO• If 3gm is dissolved in 250 ml, what is the tutal normadity of the Selution as abase ? How many milliliters of O.57N H2 S@4 would be requiredd to titrate i00 me of the Solution ? Ans.s ( 0.309 N, 60.59 ml) Q12) How much water that required add to 200 ml HNO, ( densly = 1.285 gm/ml) Contains 46 wt% acid to Convert lo wt% acid solution? Ars. : 919.6 mlThe 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 3.44K/s 9:06 hw.pdf > Hw () Determine the melarity of e-ch of the folloning 2.25 kg of Cusoy in 1.45 Lof solusion O,006 mol. of Br, in lo mL of soleie O. s 0075 gm of C HHs Noz i n 1.osmL of solution Hint. The atomic numbers used in the above Problem ave O = 16 Cu: 29 Br: 35 K = 19 CI - 7 S: 16 Al: 13 N = 7
- 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.La) Provide the balance cauation for this veaction Consider th hydrasne Na He NHs Caq)NA ockag)+ H2 OpN2H rcacko to produce 4- st Na Cl(an) b)if, 136.0.me of 0.375 M amming solution reacts With188L Na OCL at STP Which the immiting reagent and Which is the excess regont. is c)if 250ML hudrazine gas is collected at STP, wheet is eaction. the percend yield of theUEid- base tit ration the Consentrat ion of ammonia Solution excess HCL was titrated ith o.07om Na, cO3 Solutian. The volume of Na, Coz Solution reguired was 15.50 ml using the following eguations: 2HCLem> + Na, COgcaps CO2 Cays + HzO1) t NaCL Calculate the concentration (molarity and ppm) of ammonia in the Original Solution.(MM of NHzis 17.031.9/4) 10.0 was by of o.10OMI HCE to Then