What weight of pyrite ore (impure FeS,) must be taken for analysis so that the BaSO, precipitate weight obtained will be equal to one-half that of the percent S in the sample? Note Mwt. of S =32, Mwt. of BaSo4 =233, Mwt. of FeS2 =119
Q: CaCO3 + O2 ------- CaCO2 + CO2, CO2 in lime water solution formed ________. precipitate H2 gases…
A: 1. CaCO3 + O2 -------> CaO + O2 2. Zn + HCl ------>
Q: As part of a soil analysis on a plot of land, a scientist wants to determine the ammonium content…
A: Given data, Mass of soil sample = 5.045g Volume of solution = 0.500L Mass of precipitate using 125mL…
Q: What is incorrect regarding the wet process of H2PO4? O a The self-limiting issue in wet process is…
A: Wet process is one of the methods to produce phosphoric acid commercially. It mainly consists of 3…
Q: Method of separation/chemical reaction (with the brief process) of 3 KG's OF SODIUM BORATE AND 1.5…
A: This invention relates to a process for the production of boric acid from sodium biborate using…
Q: Many rivers are affectwd by illegal small scale mining. Study have revealed extremlly high deposite…
A: The water pollution may be explained as the qualitative state of impurity by the cause of the use of…
Q: Give equation and explanation for Sevcick analysis
A: Randles-Sevcik gave an equation to determine the rate of the peak current which is generally denoted…
Q: Dats: O Hs hart of the ashurin eynthesies lab the Agostudents followeing. Stheir tenowledge. work…
A: (a) Calculate the moles of reactants, Moles = massmolar massMoles of C51H98O6 =231.5 g807.32…
Q: The weight of 5 ml of vinegar sample was 5.228 g, was required 30.5 ml of 0.2 M sodium hydroxide…
A: Acid reacts with base to form salt and water and this reaction is known as neutralization reaction.…
Q: A 0.512 g sample of a commercial phosphate detergent was ignited at a red heat to destroy the…
A: You have the weight of the final residue, its molar mass and theamount of phosphorus in it. Assuming…
Q: 4. The maximum value of n in [Cu(EN),,J for a Cu2+-EN solution is the key to a gravimetric method…
A: Coordination compounds are formed by the coordinate bonding of central metal and ligand. In this…
Q: what is the expected results, for analysis of heavy metals ( Pb, Cu, Zn, Cr, & Cd) in drinking water…
A: To ensure the safety of drinking water for human consumption, various tests being practiced…
Q: A solid that reappears from the solution is called sublimate O residue immiscible O crystal
A: Sublimate is the solid which has been sublimed. It means solid substance changed to vapour state.…
Q: Show complete solutions for cach poblem. A seientiet tasked to extract Fe from was an suspension…
A: A) The balanced reactions are as follows: I) Fe2O3(s)+3SO3(g)→Fe2(SO4)3(aq)II)…
Q: what is the purpose of preparing of a standard sodium hydroxide solution in determination of purity…
A: We prepare a standard sodium hydroxide solution in determination of purity on impure KHP. Because we…
Q: Calculate the mean activity coefficient y, for the Ba2+ and SO2 ions in a saturated solution of…
A:
Q: Nitrogen in organic Compunds is tested by the addition of few dops of Saturated iron Cici) Sulphae…
A:
Q: In a lab, you diluted a sample of bleach to 1/10 concentration in a 250 vol. flask. Then…
A: Given: Volume of diluted bleach (V1) = 250 mL molarity of sodium thiosulfate (M1) = 0.1215 M diluted…
Q: 17- The percentage of profein in meat products is determined by multiplying the %N as determined by…
A: Given, weight of meat scrap = 2.000 g Vol of H2SO4=50.0 mL Vol. of NaOH = 28.80 mL
Q: What is meant by non-stoichiometric defect? Ionic solids which have anionicvacancies due to metal…
A: Metal excess defect and metal deficiency defect are the two main classes of non-stoichiometric…
Q: Arsenic(III) oxide (As2O3) is available in pure form and is a useful (but carcinogenic) primary…
A: (a) Given that,Weight of KMnO4 is 3.209 g.The molar mass of KMnO4 is 158.034 g/mol.Volume of the…
Q: 1.5g sample contains sulfur S (aw=32) has been dissolved. The sulfur is precipitated as BaSO4 (mw =…
A: Given information: Mass of sample = 1.5 g Mass of precipitate = 0.65 g
Q: The weight of 7 ml of vinegar sample was 7.99 g, was required 31.0 ml of 0.3 M sodium hydroxide…
A: Now, the chemical reaction taking place is- CH3COOH + NaOH→CH3COONa + H2O Thus, 1 mole of acetic…
Q: Question 2: lab on thermodynamic data for the dissolution of borax
A: Given, 12.11mL of 0.500M HCl 50mL of Lithium tetraborate
Q: Does the NaOH raise or lower the solution pH? What is the amount of NaOH added in lbs/ton? What is…
A: Volume of solution = 200 gallons 1 gallon = 0.0315 ton So, Volume = 6.3 ton We have added NaOH to…
Q: In the analysis of ammonium ferrous sulphate sample for the content of Fe use was made of a weighed…
A:
Q: A 0.64 g sample containing KCI ( mw = 74.6) is dissolved in 50mL of water and titrated to the…
A: The %W/W of KCl in the solution has to be given,
Q: 1- The mercury present in a sample with a mass equal to 0.8142 g was precipitated with an excess of…
A: Given information, Mass sample of mercury = 0.8142 g Mass of product i.e. Hg5(IO6)2 = 0.4114 g
Q: Considen the reach to produce hydrasone N,2 H NHs Caq) NA oc(a) H2 OtNgHag st Na Cl(a) a) Provide…
A:
Q: Determine the relationship between the observed/apparent value (EX) VERSUS that of the true value…
A: 1. Over ignition would cause the degradation of the precipitate.
Q: Solution for 0.105g of the K3[Fe(C2O4)3] (MW= 437.2 g/ mol) were dissolved in sulfuric acid and got…
A: In this question determine amount of oxalate by makin equivalents of oxalate and KMnO4 equal.
Q: To a 0.5 g sample of impure NaCl are added 0.784 g of pure AgNO3 (MW = 169.88) crystal. This is in…
A: During calculation, it was found that the concentration of KCNS should be 0.028 M. hence solving the…
Q: For titration for determination of Chloride, 0.05 AgNO3 and NaCl with a 5% (w/v) K2CrO4 indicator,…
A: In the determination of chloride ion concentration by Mohr's method, NaCl is used as the primary…
Q: Calculate the solubility (in g/L) of Aluminum
A:
Q: Hydrolysis oF a Compand B(formela Gitycls )was cam refluxing with excess potassium hydroxide…
A: Solution: So this is the type of precipitation reaction. As strong base (KOH) used Acid like HCl…
Q: To prepare orange chrome dissolve 2g of lead acetate in 25cc of Warm distilled water, add 4cc oF 2…
A: Chrome orange is a mixed oxide with the chemical formula, Pb2CrO5.
Q: Example: Caleulate the petential g a Kime electode 0. D1000 M naOH and saturated at 25c, mith Tm…
A: The solution is given below -
Q: he sulfate in 266.5 mg sample was precipitated as BaSO4 by addition of 27.00 mL of 0.0340 M BaCl2.…
A:
Q: A 50 mL sample solution containing 8-hydroxyquinoline (MW: 145) was analyzed by adding 25 ml, 0.1 M…
A:
Q: A 10.0mL, sample of whisky was diluted to 5.00.0 mL, A 4:00ML aliquot of the dilute Sample was…
A: Given: Volume of Fe+2 = 19.6 mL Concentration of Fe+2 = 0.1250 M Volume of Cr2O7-2 = 50.0 mL…
Q: - A sample of feldspar weighing 1.500g is decomposed, and eventually there is obtained a mixture of…
A: Amount of feldspar = 1.500 g Mixture of NaCl and KCl = 0.1801 g Concentration of AgNO3 =0.08333 N…
Q: 21. Some 1.0 g steel samples are believed to contain about 2.5% cobalt. Ifa 10% excess of the…
A: Molecular weight of cobalt = 59 Molecular weight of 1-nitroso-2-naphthol = 173
Q: he mercury in a 0.8142-g sample was precipitated with an excess of paraperiodic acid, H5IO6:…
A: The ratio of mass of the particular compound to the total mass multiply by 100 is known as percent…
Q: (a) Why is a small amount of MgY2- often added to a water specimen that is to be titrated for…
A:
Q: A sample of feldspar weighing 1.500g is decomposed, and eventually there is obtained a mixture of…
A:
Q: In redox titrations, an auxiliary agent can be used to unify the oxidation states of analyte. The…
A: Volumetric titration is an analytical technique that determines the concentration or amount of…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- It is required to know the concentration of an aqueous solution of H2SO4 that appeared in the laboratoryChemistry III and it's unlabeled. To this end, a student of analytical chemistry carried out the followingProcedure: He took 5.00 mL of a fresh and standardized solution of 0.525M NaOH and brought them to a250.0 mL balloon to be completed with distilled water. Subsequently, he poured 15.00 mL of the solutionH2SO4 of unknown concentration in an Erlenmeyer flask and added 2 drops of phenolphthalein.Using a burette filled with the last NaOH solution, he noticed that when adding 39.40 mL of the hydroxidethe Erlenmeyer solution reached a faint but permanent pink. With the above dataDetermine the concentration and pH of the H2SO4 solution.A sample of soluble salts weighs 1.200g and contains chloride, bromide, and iodide. With AgNO3 a ppt is obtained which weighs 0.4500g on heating this ppt in Cl2 gas, the AgBr and AgI are converted to AgCl, and the ppt then weighs 0.3300g. A similar sample, when treated with palladous chloride, ppt only PdI2, and this ppt weighs 0.900g. Find the approximate percentages of chlorine, bromine, and iodine in the original sample.(a) If the molar solubility of Tl2S at 25 oC is 5.31e-08 mol/L, what is the Ksp at this temperature?Ksp = (b) It is found that 1.75e-06 g of Cu3(AsO4)2 dissolves per 100 mL of aqueous solution at 25 oC. Calculate the solubility-product constant for Cu3(AsO4)2.Ksp = (c) The Ksp of BaCO3 at 25 oC is 2.58e-09. What is the molar solubility of BaCO3? solubility = ____ mol/L
- Sources of Error Determine the relationship between the observed/apparent value (EX) VERSUS that of the true value (ET) for the quantity being sought by writing either <, >, or = on the space provided. TOPIC: Measured mass of the precipitate 1. Overignition which causes the conversion of BaSO4 precipitate to BaO. EX _____ ET2. Precipitate was not washed thoroughly. Ex _____ ET TOPIC: Standardization of Titrant 3.Distilled water was not equilibrated to room temperature before the preparation of NaOH titrant. EX _______ ET(a) If the molar solubility of Cu3(PO4)2 at 25 oC is 1.67e-08 mol/L, what is the Ksp at this temperature?Ksp = _______(b) It is found that 1.75e-06 g of Cu3(AsO4)2 dissolves per 100 mL of aqueous solution at 25 oC. Calculate the solubility-product constant for Cu3(AsO4)2.Ksp = _______(c) The Ksp of ScF3 at 25 oC is 5.81e-24. What is the molar solubility of ScF3?solubility = ______ mol/LA first-stage recovery of magnesium from seawater is precipitationof Mg1OH22 with CaO:Mg2+(aq) + CaO(s) + H2O(l)---->Mg(OH)2(s) + Ca2+(aq) What mass of CaO, in grams, is needed to precipitate 1000lb of Mg(OH)2?
- In the standardi zation of HCl using pure anhydrou s sodium carbonate as primarystandard for methy l orange as indica tor , 1.0 mL HCl was found to be equiva lent to 0.05gof sodium carbonate (MW =106). The no rmality of HCl isUsing the term u of KSP experimental procedure the 6 p.m. As you add 5 ml of .004M AgNo to 5ml of .0025M K2CrO4. Is either of these reagents in excess? If so which one?If all other variables were kept constant, determine theeffect that the following errors would have on the calculatedpercent yield of the product. Would the yield be expected toincrease, decrease, or would there be no effect? Explainyour reasoning.– The product was insufficiently dried before weighing.– Some of the product was lost during the transfer fromthe Buchner funnel to the evaporating dish.– 7.5 mL of FeCl3 was added instead of 3.0 mL asoutlined in the procedure.– 4.587g of K2C2O4H2O was used instead of exactly4.000g .– The recrystallization step was skipped and theexperiment went straight to vacuum filtration.
- One litre of a saturated aqueous solution of Ag2SO4 (MW = 311.79 g mol- 1) at 25 °C is evaporated to dryness. 4.844 g of Ag2SO4 residue was produced. What is the solubility product (Ksp)?To a 0.5 g sample of impure NaCl are added 0.784 g of pure AgNO3 (MW = 169.88) crystal. This is in excess of the amount required to ppt. All the Cl as AgCl. After dissolving and filtering out the pptd. AgCl, the filtrate requires 25.50 ml of 0.28M KCNS. What is the percentage of NaCl (MW=58.44) in the sample?A 50 mL sample solution containing 8-hydroxyquinoline (MW: 145) was analyzed by adding 25 ml, 0.1 M KBrO3, excess KBr and acidified. The mixture was left for 10 minutes in dark place. After this time KI in excess was added followed by titration with 27.9 mL, 0.05 M thiosulfate standard solution. Write balance equations? What is the percent w/v 8-hydroxyquinoline in sample?