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A 0.207 g sample of an alloy containing lead is dissolved in nitric acid to produce an aqueous solution of lead(II) ions. This acidic solution is titrated with a 0.0136 M solution of KMnO4, forming lead(IV) and manganese(II) ions. If the titration requires 16.53 mL of the KMnO4 solution to reach the equivalence point. a. Calculate moles of permanganate required. b. Show a balanced redox equation i. oxidation ii. reduction iii. overall c. How many moles of lead are present? d. how many grams of lead does this represent? e. What is the percent lead by mass in the alloy? f. Construct a galvanic cell in contact with Pb+4 /Pb+2 in contact with a lead electrode as the anode half-cell and MnO4- / Mn2+ in contact with a pt electrode as the cathode half reaction. g. What E°cell cell for this reaction?
Which of the following solutes in aqueous solution would be expected to exhibit the largest freezing-point lowering (assuming ideal behavior)
The internuclear distance in NaCl(g) is 2.3606 angstrom, whereas in NaCl(s) the shortest Na-Cl distance is 2.814 angstrom. Explain why this should be so when the binding energy is larger in the crystal.
Using A flow diagram, show the separation of a mixture containing p-bromoacetanilide, N-cyclopentyl-N-methyl-N-propylamine (N means the group is attached to the nitrogen of the amine) and m-nitrophenol.
the pressure of a sample of gas at 10.0 c increases from 700. mm hg to 900. mm hg. what is the new
what is the total mass in grams of a series of samples that have masses of 753mg,
Compute the atomic mass of 109Ag if natural abundance of 107Ag is 51.87% & atomic mass =106.905 amu and determine the probability of particle would be located in the range
Nitrogen gas reacts with oxygen gas to produce nitrogen monoxide in an endothermic reaction. When the temperature of the reaction at equilibrium is raised, the equilibrium will shift
Identify the reactant acting as an acid and the reactant acting as a base. Indicate whether the acid is Bronsted Lowry acid, Lewis acid or both.
Calculate the freezing point depression of a solution containing 0.20% wt/v glucose (mol wt of 180) and 0.5% NaCl
Write a chemical reaction demonstrating that SO2 is an acidic oxide. c) Write balanced chemical reactions demonstrating that Al2O3 is amphoteric.
For our experiment we put 5 mL of red Kool-Aid in an empty 25 mL volumetric flask, we then slowly added water until it reached the 25 mL mark in the flask and recorded our observations. Obviously the red Kool-Aid was diluted by the water making it..
A 3.18 L sample of hydrogen chloride (HCl) gas at 1.64 atm and 31 degrees C is completely disolved in 710 mL of water to form hydrochloric acid solution. Calculate the molarity of the solution. Assume no change in volume
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