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4- Hydrogen and chlorine gas are placed in a 10.0 L container and allowed to react....

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Chemistry

4- Hydrogen and chlorine gas are placed in a 10.0 L containerand allowed to react. The initial density of the mixture is 5.01x10-3 gm/ml. The vessel is at 300K and the initial pressure is 6.52atm. After the reaction is complete , the pressure is 6.52 atm. Thegas is bubbled into 1.00 liter of deionized water. In another partof the universe, a grey haired chemistry instructor prepares anacetic acid/ acetate buffer. The buffer was prepared by addingacetic acid and sodium acetate to 2.50 L of deionized water. Now,as universes collide, our hero adds 107 ml of the HCl solution to405 ml of the buffer. The pH is measured and is 4.35 after the HCladdition. A drop of phenolphthalein is added and the solution istitrated to equivalence with 657 ml of 0.920 M NaOH. Calculate theoriginal molarities of the weak acid and conjugate base in the 2.50L solution?

Answer & Explanation Solved by verified expert
4.5 Ratings (886 Votes)
SolutionThe concentration of HCl solution isc nV where n is the number of molesAs the initial density is 000501 gmL the total mass of gasesis 000501gmL10000mL 501 gThe total number of gas moles is n PVRTConverting pressure to SI unitsP 660639 PaConverting volume to SI unitsV 001 m3T 300 KR 8314    See Answer
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