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A solution of potassium permaganate is standardized with iron metal, a primary standard. The iron is dissolved in acid, reduced to Fe(II), and titrated with permanganate.
5Fe^2+(aq)+MnO4^-(aq)+ 8H+(aq)----> 5 Fe^3+(aq) + Mn^2+ +4H2O (l)
33.17 ml of permanganate is required to titrate a 0.5497-g sample of iron. Calculate the molariity of the potassium permanganate solution.
What difficulties could you encounter trying to determine the cp of a chunk of metal that has a hollow center?
According to the Second Law of Thermodynamics, any process during which the entropy of the system increases will be product-favored.
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species
draw a lewis structure for one important resonance form of HAsO4 2-. In clude lone pair electrons and indicate nonzero formal charges
The concentration of urea (MW=60.0g/mol) in a solution prepared by dissolving 16 g of urea in 39 g of H2O
How many moles of sulfur dioxide, SO2 are contained in a 5.0 L container at STP?
The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.300 M NaOH. A. What volume of NaOH is needed to reach the end point of the titration?
The pressure on 200 ml of oxygen gas changes from 380 mm hg to 760 mm hg. The temperature does not change. What is the new volume of the oxygen gas?
For the elementary processes whose equations are given below, determine whether each is unimolecular or bimolecular and determine the rate law for each process.
What is the partial pressure of hydrogen gas in a mixture of hydrogen and helium if the total pressure is 588 mm Hg and the partial pressure of helium is 445 mm Hg?
The amount of nitrogen in an organic subsxtance can be determined by an anlytical method called the Kjeldahl method, in which all the nitrogen in the organic substance is converted to ammonia.
Assuming ideal gas behavior, calculate the mass of (in ) present in the reaction mixture at equilibrium. What is the percent yield of the reaction under these conditions
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