In one experiment, 0.2480 g sample of CaCO3 was dissolved in an acidic solution. The calcium was precipitated as CaC2O4.H2O and the dry precipitate was weighed at 0.3084 g. Calculate the percentage of CaO in the sample (Molecular weight CaCO3 = 100 g mol-1, CaC2O4.H2O = 146 g mol-1, CaO = 56 g mol-1).

Q: .A 1.6394-g sample of limestone taken from Sinuhutan Cave in Brgy. Onop, Miagao was analyzed for Fe,…

A: A numerical problem based on inorganic chemistry, which is to be accomplished.

Q: Basic solution Potassium permanganate, KMnO, is a powertul oxiding agent. The products ot a given…

A: Answer: Unbalanced redox reaction in basic medium is shown below: MnO4-(aq)+F-(aq)→MnO2(s)+F2(aq)

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 arsenic in a 1.22-g sample of a pesticide was converted toAsO43- by suitable chemical treatment.…

A: a). The oxidation state of As in AsO43- is +5. b). Silver arsenate is the name of  Ag3AsO4 by…

Q: 0.2219 g of pure iron wire was dissolved in acid nd iron reduced to+2 state. Then the solution…

A: In a redox reaction, one reactant is oxidized by releasing the electrons and another reactant is…

Q: What volume of 0.100 M sodium carbonate solution is required to precipitate 99% of the Mg from 1.00…

A: Here the balanced chemical equation is: Na2CO3 + Mg(NO3)2 = MgCO3 + 2NaNO3 So, 1 mol of Na2CO3…

Q: A solution containing KCI (74.551 g/mol) is analyzed by the Mohr Method. A 0.8312-g sample is…

A: The volume of AgNO3 required by the sample is 27.99 mL The volume of titrant required to reach the…

Q: You have a Magnox sample that weighs 1 g. Knowing that it is an alloy, all the other interferents…

A:

Q: When 38.0 mL of 0.1250 M H,SO, is added to 100. mL of a solution of PbI,, a precipitate of Pbso̟…

A: Since PbSO4 is lesser soluble than PbI2, a precipitate of PbSO4 is formed when H2SO4 is treated with…

Q: If a solution containing 0.10 M Cl2, Br2, I2, and CrO4 is treated with Ag1, in what order will the…

A:

Q: If a sample of silver coin weighing 0.2500 gives a ppt of AgCl weighing 0.2991, what wt of AgI could…

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Q: OWLV2 | Online teaching and learning resource from Ceng Revlew Topica) [References] es to access…

A:

Q: what is a good example of introduction of the experiment "Determination of %SO3 in a Soluble Sample"

A: The amount of an analyte can be determined through the measurement of mass in the technique call…

Q: A solution of NaCI(aq) is added slowly to a solution of lead nitrate, Ph(NO, ),(aq), until no…

A: Given that;                    Weight of PbCl2 = 18.09 g              Volume of solution = 200 ml =…

Q: When 38.0 mL of 0.1250 M H,SO, is added to 100. mL of a solution of PbI,, a precipitate of PbSO,…

A: We know that We have, Molar mass of PbSO4 = 303 g/mol Mass of PbSO4 = 0.0471g So Moles of PbSO4 =…

Q: A series of sulfate sample is to be analyzed by precipitation as BaSO4. If it is known that the…

A: Given: In the given problem, sulfate sample is analyzed by precipitation as . Balanced equation is…

Q: Tungsten trioxide (WO,) has a rich yellow color and is often used as a pigment in ceramics and…

A:

Q: A mixture containing PbCO3 is treated with HNO3 to completely dissolve the PbCO3. The resulting…

A: Two numerical problems based on chemical composition, which is to be accomplished.

Q: 7. An impure sample of NagSO, weighed 1.562 g. A BASO, precipitate from this sample weighed 2.496 g.…

A: Chemical equation: Na2SO4  +   BaCl2   ------>   BaSO4  +  2NaCl Number of moles of BaSO4 =…

Q: 1. In a redox titration, 12.50 mL of 0.800 mol/L K2Cr2O7 (aq) was used in an acidic solution to…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Titration of 0.2342 g of pure Na,C,0, (134.0 g/mol) required 33.45 ml of KMNO, solution according to…

A: Given :- mass of Na2C2O4 = 0.2342 g   Molar mass of Na2C2O4 = 134.0 g/mol   Volume of KMnO4 solution…

Q: A sample is known is known to consist of NaOH (40 g/mol) or NaHCO3 (84 g/mol), or Na2CO3 (106 g/mol)…

A: Given that : The sample contains : NaOH (40 g/mol) or NaHCO3 (84 g/mol), or Na2CO3 (106 g/mol) or…

Q: When 38.0 mL of 0.1250 M H,SO, is added to 100. mL of a solution of PbI,, a precipitate of PbSO,…

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

Q: A sample of copper oxide weighing 2.013 g is dissolved in acid, the pH adjusted, and excess KI…

A:

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: Solution A is 5.35×10 ^-4M sodium iodide and Solution B is 5.35×10^-5  M in copper(I) acetate. If…

A: The overall reaction taking place is: NaI (aq)+CH3COOCu (aq)→CH3COONa (aq)+CuI (s) Thus the…

Q: A0.600 g sample containing arsenic (As) was converted to H,AsO, by suitable treatment. 40.00 mL of…

A:

Q: A 0.600 g sample containing arsenic (As) was converted to H3AS0, by suitable treatment. 40.00 mL of…

A:

Q: Calculate the% of Ce (MA 140.115 g / mol) that contains a sample with a mass of 4.37 g that was…

A: Given, MA of Ce = 140.115 g/mol  Mass of sample = 4.37 g   Precipitate formed  is Ce(IO3)4   MW of…

Q: An impure sample of KHP had a mass of 1.520 g, It was dissolved in titrated with 38.5 ml of 0.155 M…

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Q: TO 30. Equal volumes of 0.10 M AGNO, solution and 0.075 M NaCI solution is poured into a beaker.…

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Q: What is the percentage purity a sample of (A12S04)3 if a 0.5000 g sample producted a precipitate of…

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

Q: Tungsten trioxide (WO,) has a rich yellow color and is often used as a pigment in ceramics and…

A: For balancing in acidic medium, O is balanced by using H2O and H-atom is balanced by addition of H+…

Q: Firstly, the student used potassium hydrogen phthalate (KHP, 204.22 g/mol) as standard to determine…

A: Standardization: Number of moles of KHP reacted in trail 1 be calculated as follows, From the…

Q: 3.02 g of sodium sulfate was mixed into a solution containing 48.5 mL of 0.185 mol/L aqueous silver…

A: Given: 3.02 g of sodium sulfate was mixed into a solution containing 48.5 mL of 0.185 mol/L aqueous…

Q: You choose to investigate some of the solubility guidelinesfor two ions , the chromate ion(CrO4)-2…

A:

Q: The mercury in a 1.0287-g sample was precipitated with an excess of paraperiodic acid, HylOg SH3²* +…

A: Percentage by mass is defined as the mass of substance present in mass of sample multiplied by 100.…

Q: A 20 mL volume of 0.015 M KIO3 containing an excess of KI, is added to a 0.312 g sample of a Real…

A: Given data : 20 ml of 0.015 M KIO3 react with 0.312 g of real Lemon sample. By adding excess KI the…

Q: Write the balanced equation for the reaction of aqueous Pb(CIO,), with aqueous Nal. Include phases.…

A: Given parameters are: Pb(ClO3)2 reacts with aqueous NaI volume of Pb(ClO3)2 = 1.5 L Volume of NaCl…

Q: A sample barium halide (Bax2 2H20) weighing 0.3567 g was precipitated as BasO4. Determine the…

A: Mass of BaSO4 = 0.3732 g  Mass of reactant BaX2 .2H2O = 0.3567 g We need to determine X.

Q: Tungsten trioxide (WO,) has a rich yellow color and is often used as a pigment in ceramics and…

A: We have find out the percentage of WO3 in ceramic sample.

Q: A 0.3749 g soda ash sample is analyzed by titrating sodium carbonate with the standard 0.2388M HCl…

A: The amount of sodium carbonate present in the given soda ash temple is equal to the amount of…

Q: Under these conditions the acid acetylsalicylic (MW, 180) reacts according to: CH3COO-C6H4-COOH + 2…

A: To analyze an aspirin sample, 0.3470 g of crushed tablets are weighed and treated with 50.00 mL…

Q: 0.646 g of sample containing BaCl2.2H2O (244.26 g/mol) was dissolved and enough potassium chromate…

A: In a chemical reaction, two or more reactants react with each other to form new substances. This new…

Q: The concentration of CO in the air can be determined by passing a known volume of air through a tube…

A: Parts per million is a commonly used  unit of concentration  for small values  and parts per million…

Q: How many grams of irion

A: KMnO4 and Fe2+ titration is a type of redox titration in which we titrate the iron by KMnO4  at the…

Q: 2KMnO4 (aq) +5H2C2O4 (aq) + 3H2SO4 (aq)   >   10CO2 (g) + K2SO4 (aq) +2MnSO4 (aq) + 8H2O (l) 90ml…

A: The balanced reaction taking place is given as, => 2 KMnO4 (aq) + 5 H2C2O4 (aq) + 3 H2SO4 (aq)…