A 1.000-g sample containing KHC2O4, H2C2O4, and impurities required 46.48 mL of 0.0980 M NaOH for titration. A duplicate sample required 48.33 mL of 0.0220 M KMnO4 for titration in acid solution, according to the reaction: 5C2O42- + 2MnO4- + 16H+ → 2Mn2+ + 10CO2 + 8H2O. Calculate the percentages of KHC2O4 (128.13) and H2C2O4 (90.04) in the sample.

Q: 5 Consider the following chemical equation: H₂A RbOH() Rb Ag+ H₂O A0.126 mol sample of impure…

A: We know that, At equivalence point the number of moles of H+ ions is equal to the number of moles of…

Q: A 0.1285-g sample of impure Na2CO3 was dissolved in 20.00 mL of 0.2034 M HCl. The excess HCl was…

A: We will first find out the actual mass of Na2CO3 present in the sample by calculating the moles of…

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: 3. The ethyl acetate concentration in an alcoholic solution was determined by diluting a 10.00-mL…

A:

Q: 1) Potassium permanganate solutions used in oxidation-reduction titrations are often standardized…

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

Q: A 2.00 mL sample of serum is analyzed for protein by the modified Kjeldahl method. The sample is…

A: Given, mass of sample of serum = 2.00 mL Volume of HCl = 15.0 mL Acid consumed = 33.3 mL Mass of…

Q: the molarity of the NaOH solution used

A:

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: Balanced eqation: 2 H3PO4 + 3 Ca(OH)2 → 6 HOH + Ca3(PO4)2 What is the molar concentration of 325.25…

A: H3PO4 is a strong acid and dissociates completely to produce 3 H+ ions. Similarly Ca(OH)2…

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 1.0325-g sample of a wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was…

A: The excess of HCl used can be calculated using, Millimoles of NaOH = millimoles of HCl Getting this…

Q: The solubility product of a sparingly soluble salt, XF2, was determined by titration and found to be…

A: This means effective concentration of constituent ions in solution. Hence from it we can calculate…

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: If you are making 500 ml of a stock solution of 10X PBS pH7.4 please tell me how much of each…

A: Molarity is a way of expressing concentration. It is the moles of solute present in 1 L solution.

Q: 0.753-g sample of a chlorocarbon compound was analyzed by burning it in oxygen and collecting the…

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

Q: A 50.0 mL solution of Ca(OH)₂ with an unknown concentration was titrated with 0.340 M HNO₃. To reach…

A: The reaction of HNO3 and Ca(OH)2 is, In the given reaction moles ratio between HNO3 and Ca(OH)2 is…

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

A: The explanation is given below-

Q: A 75.0 mL solution of potassium iodate (KIO3, 214.0 g/mol, 98%) was treated with KI and H2SO4 and…

A: Mass of primary standard i.e KIO3 = 0.0325 g KIO3 + 5KI + 3H2SO4 = 3K2SO4 + 3H2O + 3I2  3I2 +…

Q: 25.00 mL of a solution containing KIO4 is treated with excess potassium iodide. IO4- + 8H+ + 7I- →…

A: Given,The reactions:IO4- + 8H+ + 7I- → 4I2 + 4H2OI2 + 2S2O32- → 2I- + S4O62-Volume of the solution =…

Q: 25.00 mL of a sample containing Hg2²+ was titrated with 0.05789 M of KIO3, requiring 35.69 mL to…

A: In this question we have to calculate the concentration of Hg22+ in the sample.

Q: Excess solid Ni(OH)2 was added to water and the resulting solution was allowed to stand for several…

A: In order to find Ksp, we need dissociation equation of Ni(OH)2(s) and equation for reaction with…

Q: 17.69 mL of the I2 solution from above is required to titrate a sample containing As2O3. Calculate…

A: The balanced equation is given as As2O3 + 5H2O + 2I2 -----> 2H3AsO4 + 4HI The number of moles of…

Q: 4. A solution of malonic acid, H₂C3H₂O4, was standardized by titration with 0.1000 M NaOH solution.…

A: Volume of NaOH = 20.76 mLMolarity of NaOH = 0.1000 MVolume of H2C3H2O4 or malonic acid = 12.95 mL

Q: A0.184 g sample of Na C204 was titrated with KMNO4. The sample required 18.83 mL of KMNO4 to reach…

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