A solution of sodium thiosulfate was standardized by dissolving 0.1210 g KIO3 (MM=214) in water, adding a large excess of KI, and acidifying with HCI. The liberated iodine required 41.64 mL of the thiosulfate to decolorize the starch/iodine complex. Calculate the molarity of the Na₂S₂O3.

Q: To determine the concentration of an EDTA solution, the following zinc(II) solution is prepared:…

A: metallic zinc (m(Zn) = 0.505 g) is dissolved in dilute sulfuric acid, the resulting solution is…

Q: . Find the molarity of the HNO3 solution and its absolute uncertainty.

A: As per the balanced chemical reaction, 2 mol of HNO3 reacts with 1 mol Na2CO3. Now, No of moles =…

Q: The digestion of a 0.1387-g sample of a phosphorus containing compound in a mixture of HNO, and…

A: Solution: Given: Mass of the sample containing phosphorus = 0.1387 gMolarity of NaOH solution =…

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: 2 HyPOalaq) + 3 Mg(OH)2(ag) = Mga (P04/21s) + 6 H201 If 35.0 mL of 1.67 M HsP04 are reacted with…

A: This question is based on stoichiometry.

Q: Your laboratory uses an analytical instrument for lead (Pb) that requires calibration with four…

A: Solution - According to the question - Given - M2 = 50 µg/ml V2 = 95 ml + 5 ml = 100 ml V1 = 5 ml…

Q: Suppose the Kc value for Cobalt (II) hexahydrate is 6.80 and suppose upon heating the solution…

A: The equilibrium constant can be written as the ratio of concentration of products to the…

Q: 300 milliliters of a stock solution of potash of alum was mixed with sterile normal saline to…

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Q: A solution is made by mixing 500.0 mL of 0.04419 M Na₂ HASO4 with 500.0 mL of 0.03835 M NaOH.…

A: The balanced chemical equation for the reaction between Na2HAsO4 and NaOH is: Na2HAsO4 + 2NaOH →…

Q: To determine the concentration of an EDTA solution, the following magnesium(II) solution is…

A: metallic magnesium (m(Mg) = 0.5012 g) is dissolved in dilute sulfuric acid, the resulting solution…

Q: A quantitative analysis for ethanol, C2H60, is accomplished by a redox back titration. Ethanol is…

A:

Q: A 0.5516 g mixture of KCN (MW = 65.116 g/mol) and NaCN (MW = 49.005 g/mol) was dissolved in water.…

A: Given that, The mass of the mixture of KCN and NaCN is 0.5516 g. Molecular weight of KCN = 65.116…

Q: You determine the acetic acid content in vinegar by titrating with a standard (known concentration)…

A: Given: weight of vinegar=5.023±0.003 g Molarities of NaOH in 3 trials = 0.1167, 0.1163, 0.1164 M…

Q: An impure sample of KCIO, (FW = 122.5 g/mol) weighing 0.1353 grams was dissolved in 50.0 mL…

A: By considering balanced reaction for individual steps we can figure out mass of KClO3 present in the…

Q: The alkalinity of natural waters is usually controlled by OH (MW = 17.01 gimole). CO,2 (Mw = 60.01…

A: To reach the phenolphthalein end point, OH- reacts completely and CO32- react partially to form…

Q: A standard solution of (FeSCN)2+ was prepared by mixing 5.00 mL of 0.00200 M KSCN , 6.00 mL of 0.220…

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Q: An AGNO3 solution with NaCI equivalent of 5,972 mg / ml is used as a titrant in volumetric analysis.…

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Q: For breakfast, the nihilistic Rick Sanchez ate 100 g of cereal mixed with 20 g of milk. A 1.500 g…

A: Given: The molar mass of N (nitrogen) is 14.07 g/mol. For cereal: The amount of cereal consumed is…

Q: 150.0 mL of 0.2105 M HNO3 was added in excess to 1.3415 g CaCO3 (100.09 g/mol). The excess acid was…

A: Given - volume of HNO3 = 150.0 mL             Molarity of HNO3 = 0.2105 M             Mass of CaCO3…

Q: Five white, 500-mg uncoated ascorbic acid (AA) tablets with an average weight of 0.6100-g were…

A: To calculate the amount of ascorbic acid present in a uncoated ascorbic acid tablet having an…

Q: Give only typing answer with explanation and conclusion 0.1745 g of primary standard Na2C2O4 is used…

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Q: (a) Standard oxalate was made by dissolving 3.514 g of Na2C2O4 in 1.000 L of 1 M H2SO4. A 25.00-mL…

A: The molarity of the solution is the number of moles of solute to the volume of the solvent in…

Q: Use the following atomic masses (in g/mol): Mg = 24.31; O = 16; Ca = 40.08; C = 12.01; Na = 23; H =…

A:

Q: what is the molarity of a solution that results from dissolving 5.4 g of a compound with FW 169.51…

A: Molarity: The number of moles of a solute present in one liter of solution is known as the molarity…

Q: Potassium permanganate solutions may be standardized by titrating against primary standard sodium…

A: Mass of Na2C2O4 = 0.2168g  Molar mass of Na2C2O4 = 134g/mol  Moles of Na2C2O4 = 0.2168g÷134g/mol =…

Q: A 10.00 mL sample containing 8.00 g/L of a mixture of KCI and NaCl was titrated with 0.10 M standard…

A: Given: Volume of sample = 10.00 mL = 0.010 L                                (Since 1 L = 1000 mL)…

Q: When standardizing two liters of a potassium permanganate solution with a primary standard solution…

A: The objective of this question is to determine the mass range of sodium oxalate that should be…

Q: Step 1 :4.9668 g of Na2SO3 was dissolved in 30ml distilled water by heating. Step 2 : Then 6.0895g…

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Q: A 0.1214-g sample of impure Na2CO3 was analyzed by the Volhard method. After adding 50.00 mL of…

A: The net ionic equation is given below

Q: A 1.8M HCl solution was standardized against 1.4g sodium carbonate Na2CO3 (MW = 106g/mol) . The…

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Q: A 0.4140-g sample of impure Na2CO3 (FW 105.99) was analyzed by the Volhard method. After adding…

A: Given that -  Mass of impure Na2CO3 = 0.4140 g  Formula weight of Na2CO3 = 105.99  Volume of AgNO3 =…

Q: The alcohol content in a 10.0 g sample of blood from a driver required 4.23 mL of 0.07654 M K₂Cr₂O7…

A:

Q: A 0.4435-g sample of impure Na2CO3 (FW 105.99) was analyzed by the Volhard method. After adding…

A:

Q: A 0.08 M sodium hydrOxide solution was prepared and titrated against 25 mL of 0.11 M formic acid,…

A: It is an neutralization titration . 17 ml of 0.08 M NaOH has been added to 25 ml 0.11 M formic acid.

Q: A student determined the concentration of copper by ion exchange. He obtained the following results:…

A:

Q: 24. According to the solubility curve, which of the following ionic compounds would be considered…

A: The solubility curve gives information about the concentration of solute for a saturated solution

Q: A 1.8M HCl solution was standardized against 1.4g sodium carbonate Na2CO3  (MW = 106g/mol) . The…

A: Na2CO3 is a diacidic weak base and hence can neutralize 2 moles of HCl.  Ammonia, NH3 is a…

Q: A 4.85 cm3 fruit juice sample was titrated against 7.5 x 10-4 mol/L iodine solution, using starch…

A: Given: The Volume of the fruit juice sample, V1=4.85 cm3 =4.85 mL The molarity of iodine solution,…

Q: An ore was found to contain iron and ferric oxide, if 0.5g of the ore, after solution in acid and…

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Q: A sample containing calcium was analyzed by gravimetry, converting all calcium to calcium oxalate…

A: Given that the precipitate is calcium oxalate monohydrate.

Q: A student weighted a 1.150gram sample of pure KHP and titrated it with 36.45ml of KO solution.…

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Q: A dried sample of commercial salt was prepared by a coning and quartering. A 0.911-g sample of the…

A: NaCl (aq) + AgNO3(aq) -----> AgCl(s) + NaNO3(aq) 1 mole AgNO3(silver nitrate) neutralizes 1 mole…