Le Chatelier\'s principle applies to---------system(s). a)non-eqm b) eqm and non
ID: 529631 • Letter: L
Question
Le Chatelier's principle applies to---------system(s). a)non-eqm b) eqm and non-eqm c) eqm d) ANY system with known concentration and temp For the Haber process, N_2(g) + 3H_2(g) = 2NH_3(g), kp = 1.45 times 10^-5 at 500 degree C. In an eqm mixture of the three gases at 500 degree C, the partial pressure of H_2 is 0.928 atm and that of N_2 is 0.432 atm. What is the partial pressure(atm) of NH_3 in this eqm mixture? a) 2.24 times 10^-3 b) 1.86 times 10^-7 c) 2.19 times 10^-9 d) 1.5 times 10^-2 What is the PH and pOH, respectively, of 0.07 M KOH? a) 10.25 and 3.75 b) 12.58 and 1.42 c) 9 and 5 d) cannot be calculated simultaneously.Explanation / Answer
(8) Le Chatlier's principle is applied to (c) equilibrium systems.
(9) Applying equilibrium constant expression,
Kp = PNH32 / PN2*PH23
1.45 * 10-5 = PNH32 / (0.432 * 0.9283)
PNH3 = 2.32 * 10-3 atm
(a)
(10)
KOH (aq.) ---------> K+ (aq.) + OH- (aq.)
[OH-] = [KOH] = 0.07
pOH = -Log[OH-] = - Log(0.07) = 1.15
pH + pOH = 14
pH = 14 - 1.15
pH = 12.8
(b)
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