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Q. A student ran the following reaction in the laboratory at 547 K: COCl2(g) <---> CO(g) + Cl2(g) When she introduced 0.714 moles of COCl2(g) into a 1.00 liter container, she found the equilibrium concentration of COCl2(g) to be 0.680 M. Calculate the equilibrium constant, Kc, she obtained for this reaction.

Solved • Dec 5, 2019

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Q. At a certain temperature, the Kp for decomposition of H2S is 0.845. H2S=H2+S Initially, only H2S is present at a pressure of 0.232atm in a closed container. What is the total pressure in the container at equilibrium?

Solved • Dec 1, 2019

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Q. Initially, 0.960 mol of A is present in a 4.00 solution. 2A(aq)↽−−⇀2B(aq)+C(aq) At equilibrium, 0.120 mol of C is present. Calculate K.

Solved • Nov 24, 2019

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Q. For the aqueous [HgCl4]2- complex Kf=5.0x10^15 at 25C. Suppose equal volumes od 0.0044 M Hg(NO3)2 solution and 0.42 M NaCl solution are mixed. Calculate the equilibrium molarity of aqueous Hg2+. Round to two significant digits

Solved • Nov 22, 2019

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Q. Calculate the solubility at 25 Celsius of PbCrO4 in pure water and in a .0200 M Na2CrO4 solution.

Solved • Nov 20, 2019

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Q. If NH3 (ammonium pKb= 4.74) is added to the solution of Fe(NO3)3 such that after the addition we have 50mL of 5.0M NH3 and 0.0040M Fe(NO3)3 (right after the addition) find the Kc for Fe3+(aq) + 3 OH- → Fe(OH)3(s) If [Fe3+] at eq is found to be 8.8 X 10-14 M.

Solved • Nov 17, 2019

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Q. Nitrogen dioxide is one of the many oxides of nitrogen (often collectively called "NOx)) that are of interest to atmospheric chemistry. It can react with itself to form another form of NOx, dinitrogen tetroxide. A chemical engineer studying this reaction fills a 125 L tank with 29 mol of nitrogen dioxide gas. When the mixture has come to equilibrium she determines that it contains 15 mol of nitrogen dioxide gas. The engineer then adds another 9.7 mol of nitrogen dioxide, and allows the mixture to come to equilibrium again. Calculate the moles of dinitrogen tetroxide after equilibrium is reached the second time. Round your answer to 2 significant digits.

Solved • Nov 17, 2019