3. A 0.3000 g sample of impure magnesium oxide is titrated with HCl of which 3.000 mL = 0.04503 g CaCO3. The end point is overstepped on the addition of 48.00 mL of the acid, and the solution becomes neutral on the further addition of 2.40 mL of 0.4000 N NaOH. What is the percentage of MgO in the sample ?

Q: In a titration of HNO₃, you add a few drops of phenol-phthalein indicator to 50.00 mL of acid in a…

A: The total volume of acid we have taken to finally reach the endpoint = 50 + 30 = 80 mL And the total…

Q: A 25.0 mL solution of 1.00 M CaCl2 is diluted to 250.0 mL. Then, 30.0- mL aliquot of the diluted…

A:

Q: When 38.0 mL of 0.1250 M H2SO4is added to 100. mL of a solution of PbI2, a precipitate of…

A: We first find the moles of PbSO4 = mass/molar mass  Thus moles of PbSO4 = 0.0471/303…

Q: The KCIO3 in a 0.1862-g sample of an explosive was determined by reaction with 50.00 mL of 0.01162 M…

A:

Q: A 0.5123g sample (molar mass 204.23g/mol) of KHP was dissolved in about 25 mL of distilled water and…

A: Potassium hydrogen phthalate, KHP reacts with sodium hydroxide, NaOH as below.As per the…

Q: A 0.217 g sample of HgO (molar mass = 217 g/mol) reacts with excess iodide ions according to the…

A: Reaction occurs according to law of chemical equivalency. Number of mols of any substance  =( weight…

Q: An 8.65-g sample of an unknown group 2A metal hydroxideis dissolved in 85.0 mL of water. An…

A: (a) The values are given as follows: Suppose that metal of 2A group is M. Therefore, the chemical…

Q: To determine the amount of a hypothetical compound KHA · H2A 2H2O in a pure sample, Senku asked his…

A: The compound KHA.H2A.2H2A has a total of 3 protons(H+). Hence it is a triprotic acid. #(a): Given…

Q: What mass of FeSO4.(NH4)2SO4. 6H2O is present in a sample if it is titrated to its equivalence point…

A: Given: Volume of  KMnO4    = 4.100 mL Concentration of KMnO4 = 0.100 N mass of FeSO4.(NH4)2SO4.…

Q: 0.4515-g sample of solid containing a mixture of only CuSO4 SH:O and Hg(NO:) equired 29.52 mL of…

A: Given- Molarity of KSCN = 0.1133 M volume of the KSCN = 29.52 mL Reaction of CuSO4 and KSCN ;…

Q: If a 1.25 g sample of magnesium oxide (98.9%) were titrated with 70 ml of 1.04 N of sulfuric acid,…

A: Mass of magnesium oxide = (98.9/100) × 1.25 g = 1.236g Moles of magnesium oxide =…

Q: A 0.51960.5196 g solid sample containing a mixture of LaCl3LaCl3 (molar mass = 245.26 g/mol) and…

A: The reactions of LaCl3 & Ce(NO3)3 with KIO3 are represented as follows: LaCl3 +3 KIO3  →…

Q: Suppose a student needs to standardize a sodium thiosulfate, Na, S,0,, solution for a titration…

A:

Q: 1. (10) The amount of protein in a sample of cheese can be determined by Kjeldahl analysis for…

A: Answer:- this question is answered by using the simple concept of stoichiometry which involves the…

Q: The following solutions are needed to be prepared for the titration procedure: 1. 20 mL of 2 M HCl…

A: Given: Mass of Fe(OH)n used = 1.0867 g Volume of HCl solution used = 20 mL = 0.020 L…

Q: To determine the amount of magnetite, Fe3O4, in an impure ore, a 1.5419-g sample is dissolved in…

A:

Q: (4) The amount of oxalic acid in a sample of 3+ rhubarb was determined by reacting with Fe as…

A: We should equal equivalent of both acid and Fe+3 ion to get mass of oxyliac acid  Equivalent =…

Q: 0.3043 g of pure KHP was weighed out and titrated to an end point with 15.12 mL of a NaOH solution…

A: Neutralization reaction between KHP (C8H5KO4) and NaOH is given below,

Q: If a 1.25 g sample of magnesium oxide (98.9%) were titrated with 70 ml of 104 N of sulfuric acid…

A:

Q: A 523.1mg sample of impure KBr is treated with excess AgNO3 and 814.5mg AgBr is obtained. What is…

A: Percentage purity = (mass of the pure chemical / total mass of the sample) x 100%

Q: The zinc content of a 1.50 g ore sample was determined by dissolving the ore in HCI, which reacts…

A:

Q: A 1.7483-g sample containing Al(NO:)s, AICI, and inert material was dissolved in acid and divided…

A: Percentage composition of a sample can be calculated using the molar mass of the compounds present…

Q: A dried sample of commercial salt was prepared by a coning and quartering. A 0.837-g sample of the…

A:

Q: (4) If the end point of the titration was calculated to have occurred at a volume of 17.32 mL and…

A:

Q: 3) 2.413 g sample contains Na CO,, NaHCO, and inert material. This sample was solved in water and…

A: Following are the two reactions and their indicators can be represented as: Sample contain Na2CO3 +…

Q: A solution containing 0.370 g the mineral Iron ( 55.84 g/mole) produced ferrate ion (Feo 4 -2 = Mw…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: A 1.2516 gram sample of a mixture of CaCO3 and Na2SO4 was analyzed by dissolving the sample and…

A: A 1.2516 gram sample of a mixture of CaCO3 and Na2SO4 was analysed by dissolving the sample and…

Q: the calcium in a 5.00ml serum sample is precipitated as CaC2O4 with ammonium oxalate. the filtered…

A: Number of moles of KMnO4 , n = Molarity x volume in L                                              =…

Q: What is the percentage purity a sample of (A/²SO4)3 if a 0.5000 g sample produced a precipitate of…

A: NOTE : The formula of compound aluminium sulfate is incorrectly given. It will be Al2(SO4)3 and not…

Q: Q2: A 3.275 g sample of K2CrO4 yielded a precipitate of Cr203 which weighed 1.075 g. Calculate Cr %…

A: From K2CrO4 , Cr2O3 is formed i.e. 2 mol of K2CrO4 will give 1 mole of Cr2O3 in general. % purity…

Q: The amount of protein in a sample of cheese is determined by a Kjeldahl analysis for nitrogen. After…

A:

Q: Calculate the percent purity of a sample of Mg(OH)2 if titration of 2.568 g of the sample required…

A: The percent purity is given by

Q: Exactly 0.2220 g of pure Na2CO3 was dissolved in 100.0 mL of 0.0731 M HCl.   (a) What mass in grams…

A: First of all we need to find the limiting reagent by considering the balanced reaction. When we…

Q: 50. The purity of sodium oxalate Na₂C₂O4 (134.00 g/mol) is determined by titrating with a standard…

A: Titration reaction is common quantitative lab method which used to determine the concentration of…

Q: A sample weighing 9 g of BaCl2 is dissolved in 700 mL of water, when 50 mL of the sample is titrated…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: What minimum volume of 0.09621 M AgNO3 willbe needed to assure an excess of silver ion in the…

A: The 0.2513 g sample of NaCl is assumed to have no impurities in this case, just to make certain that…

Q: When 38.0 mL of 0.1250 M H2SO4 is added to 100 mL of a solution of PbI2, a precipitate of PbSO4…

A: Given: Concentration of H2SO4 = 0.1250 M Volume of H2SO4 solution = 38.0 mL = 0.038 L…

Q: A sample of solid Ca(OH)2 was stirred in water at a certain temperature until the solution contained…

A:

Q: Question attached

A: The balanced equation for the reaction between KHP and NaOH is: C8H5KO4 + NaOH → C8H4KO4-Na+ + H2O

Q: The iron (II) in an acidified solution is titrated with 0.0317M solution of KMnO4:…

A:

Q: A sample consisting of Na2CO3 (105.96), NaOH (39.99) and inert matter weighs 1.179 g. It is titrated…

A:

Q: The amount of protein in a sample of cheese is determined by a Kjeldahl analysis  for nitrogen.…

A: Given data,Molarity of HCl=0.1047MVolume of HCl=50mL=0.050LMolarity of NaOH=0.1183MVolume of…

Q: NEUTRALIZATION From the previous lesson, you have learned that the Arrhenius theory defines…

A:

Q: 6. The purity of a sample of sodium oxalate, Na2C2O4, is determined by titrating with a standard…

A:

Q: A mixture containing only KCl (74.55 g/mol) & NaBr (102.89 g/mol) was analyzed by the Mohr method. A…

A: Chloride ion concentration of an unknown sample can be calculated using Mohr method.  In Mohr…

Q: lodide (atomic mass 126.9 g/mol) in water was determined by the Volhard method. A 20.00 mL aliquot…

A:

Q: A mixture containing only KCl (74.55 g/mol) & NaBr (102.89 g/mol) was analyzed by the Mohr method. A…

A: Chloride ion concentration of an unknown sample can be calculated using Mohr method.  Mohr method is…

Q: 3. How many mL of 0.125 M Cr** must be reacted with 12.00 mL of 0.200 M MnO4 if the redox products…

A:

Q: In one experiment, 0.2480 g sample of CaCO3 was dissolved in an acidic solution. The calcium was…

A: Given data,Mass of sample=0.2480gMass of CaC2O4.H2O=0.3084g