Chemistry Labs

International Chemistry Olympiad · 1975

Problems

  1. Problem 6The equilibrium constant of the reaction HX2+IX2⇌2 HI\ce{H2 + I2 <=> 2HI} is Kc=70.0K_c = 70.0 at 600 °C. (a) What percentage of iodine is converted at equilibrium if the reactants are mixed at 600 °C in (i) a 1 : 1 molar ratio, and (ii) a 2 : 1 molar ratio (twice as much hydrogen as iodine)? (b) How many moles of hydrogen must be mixed with 1 mole of iodine so that 99 % of the iodine is converted to hydrogen iodide at equilibrium at 600 °C?Solutions: 1