(2) j lubäi On the gravimetric determination of CI, if the weight of AgCl ppt. was 1.433 g.; the weight of Cl- in the sample will equals to: .. (AgCl molecular weight = 143.3 and Cl- =35.5) 143.3/35.5 g. 3.55 g. 0.1433 g. 0.355 g. O O
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- A sample of processed meat scrap weighing 4.000 g is digested with concentrated HSO. and Hg(catalyst) until the N present has been converted to NHHSO.. This is treated with excess NaOH, and the liberated NHs is caught in a 100-ml of H.SO. ( Iml 0.01860 g Na:OJ. The excess acid requires 57.60 ml of NaOH ( ImL = 0.12660 g potassium acid phthalate, KHCaH.OJ. Calculate the percentage protein in the meat scrap 4.Fluorite, a mineral of calcium, is a compound off the metal with fluorine. Analysis shows that a 43.35-g sample of fluorite contains 21.11 g of fluorine. Calculate the following: (a) Mass of calcium in the sample. g Ca (b) Mass fractions of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass fraction Ca mass fraction F (c) Mass percents of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass % Ca mass % F27² +1052 Zn [Zn(H₂0) 3 (CO3)3 + EXCESS (052 2 Mile Zy [24 (H₂O)) ((0₂)₂ + Excess Co znoks E2₁ (H₂0ls (03) + Excess con 2 MUR 724103 A- How many moles OF 20003 will be prodnad & each Raction B. Explain In Detail te types of chanical Butching That i Hanned yosh alshes
- 1. A student synthesized 3.214g of Ni(NH3)„Cl2 from 4.023g of N¡C12•6H2O. He dissolved 0.81g of Ni(NH3)nCl2 in 40 mL of 1.0M HCI to make a sample for analysis. Molar mass: Ni 58.7; Cl2 71; NH3 1T; H2O 18. (1) A 0.20M Ni²* standard solution had an absorbance of 1.666, while his sample had an absorbance of 0.705. Calculate the Ni2+ concentration in his sample and the mass percent of Ni in the product. Note: A = ɛbc. (2) The student used 38.75 mL of 0.498M NaOH to neutralize excess HCl in 40mL of the sample. Calculate the mass percent of NH3 in the product.rcent Yeild Kami Export - % yield WS-1 (1).pdf wnload Percent Yeild Kami Export % yield WS-1 (1).pdf (147 KB) 1. When 5.45 grams of aluminum chlorate (Al(CIO;); decompose, 1.57 liters of oxygen gas are given off. What is the percent yield? Al(CIO;); AICI3 + O2 VI. Practice 1. What is the percent yield of the following reaction if 60 grams of CaCO3 is heated to give 15 grams of CaO? COD Sign out73 Al ihe school ey decided to adt sodum carbonae (NaCOJ tohe sampled wster in the school tankin order to restore he sttavalue close to The balanced equartion for the reaction is Na,Co.e) + 2HC (ag - 2Nac (ag • H0()• co; (al 731 Calcuate the mass of sodum cartonate (Na,CO.) required to neutralize each 1 dm' of the sample water 732 Ater the neutralization. the water tasted saty. Give a reason for the saly taste of the water Refer to the equation above.
- What mass of AgI can be produced from a 0.512-g sample that assays 20.1% Al13? Precipitates used in the gravimetric determination of uranium include NazU2O7 (634.0 g/mol), (UO;);P¿O, (714.0 g/mol), and V205 - 2U03 (753.9 g/ mol). Which of these weighing forms provides the greatest mass of precipitate from a given quantity of uranium?The thiourea in a 1.563 g sample.of an organic material was extracted into a dilute H2SO4 solution and titrated with 36.43 mL of o.o09284 M Hg²* via the reaction below. 4(NH2)½CS + Hg2 - [(NH2),CS],Hg²• What is the percentage of (NH2)2CS (Molar Mass = 76.12 g/mol) in the sample?3. A 0.5g mixture contains SiO2, NacI & NH.CI. After Sublimation 0.4 g left was dissolved to Extract NaCl and Sediment SiO, , The dry SiO2 was 0.25g. What is the percentage composition of the mixture?
- (d) Br. e 0.. K :Q'BuBe sure to answer all parts. Fluorite, a minéral of calcium, is a compound of the metal with fluorine. Analysis shows that a 10.78-g sample of fluorite contains 5.520 g of calcium. Calculate the following: (a) Mass of fluorine in the sample. 19.00 g F (b) Mass fractions of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass fraction Ca mass fraction F (c) Mass percents of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass % Ca mass % FDeterminati an 25 ml by dissolving 110n (111) per 1 This (as ml 750ml experiment Solution The to of was The a and process Q on added The portion layer taken 1 volumetric diluted Litre Colution Two These of in diluted ml soo 1% ETA of Question A. reaction an Solution 0₁ 446 9 of A. R. hydrated sulphate, (NH4) Fe (504) ₂ · 12H₂0 2 of distilled then of wertel) 0,0446 g/L of lion Absorbance was 250 ml in to ·layers frask was Is 2. 3. Was Chlore form and were 5 ml, 10 ml, 15 ml por tions 4. Iron • iron (111) four oxine it mixture the done. (111) seperatory conducted Volume SMT as 10 ml 15 ml 20 ml Plo + absorbance formed readings a (A.R) Jayer measured the por tions Solution was Water diluted out 20 ml were then Each of these mark against funnel as was after with for 8- ity droxy quinolate. follows. to iron (111) solution was prepared of then Calibration was ) 10 obtain collected. ammonium F. W-481,979 then these Absorbance 0,076 0,169 9185 0₁234. Shook. the shaking added portions…