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       #Post#: 216--------------------------------------------------
       [BASICS] Problem of the week-21/5/12
   DIR By: Michel
       Date: May 22, 2012, 3:29 am
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       Hydrogen iodide decomposes when heated, according to the
       equation.
       2HI--->H2 +I2
       a) Write the expression for the equilibrium constant, Kc for the
       reaction.
       b) 1.54g of HI was heated in 600ml bulb at 803K (530'C). When
       equilibrium was attained, the bulb was rapidly cooled to room
       temperature and broken under potassium iodide solution. The
       iodine formed from the decomposition required 67.0ml of 0.1M
       Sodium thiosulfate, Na2S2O3 solution for complete reaction.
       Calculate
       i) The amount in moles of hydrogen iodide in 1.54g
       ii)The amount in moles of iodine formed when HI was decomposed.
       iii)The value of Kc at 803K (530'C)
       GOOD LUCK!
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