al equilibrium. klmore NO e liwing mation at equiliheriem, which change will couse the equilibrium to shit to the E) Remove some EBry ss mich ofthe Bng uids would make a good solvent fe iodine. 1t What is K fe the benzoate ion? The for benzolc ackd is 610 3a What\" r is the molction of water in a solution thar comsains $.6 mol of ethanol (C,H OID and 1.6 mol of A) Q11 B) 078 03 D) 0.22 E) 0.29 31. A finst-order chemical reaction is observed to have a rate constant of 31 min-, What is the corresponding half-life for the reaction? A) 443s B) 1.4 min C) 1.9s D) 13s E) 45 mitn atm (K mol), I atm- 760 torr) A) 1.70x 10\' mmHg thol tatr 40a sampl comaning 2 9 mol of as a s9 (R00821 B) 1.13 x 10 mmHg C) 8.81 x 101 mmHg D) 6.55 x 10\' mmig E) 8.62 mmHg 33. TheK, value for lad(U) chloride (Pd) is 2.4×io- What is the molar sol bility oflea401) chloride? 24x 10 mo/l A) 6.0x 10 mol/L 7.7x10-\"mol/L D) E) B) C) 3.9 x 102 mol/L 6.2 × 10-2 mol/L
Solution
27. Removing NO or Br2 would shift the reaction to the right because changing the concentration of an ingredient will shift the equilibrium to the side that would reduce that change in concentration.
A decrease in pressure due to increasing volume causes the reaction to shift to the side with more moles of gas. There is no effect on a reaction where the number of moles of gas is the same on each side of the chemical equation.
Therefore, increasing volume will have no effect.
Answer: A. Decrease in temperature
As the reaction is endothermic (delta H is positive), increase in temperature increases the K value hence according to Le-Chatelier\'s principle, to reduce the change in K to normal, reaction shifts to the left.
.
al equilibrium- klmore NO e liwing mation at equiliheriem- which chang.docx
1. al equilibrium. klmore NO e liwing mation at equiliheriem, which change will couse the
equilibrium to shit to the E) Remove some EBry ss mich ofthe Bng uids would make a good
solvent fe iodine. 1t What is K fe the benzoate ion? The for benzolc ackd is 610 3a What" r is
the molction of water in a solution thar comsains $.6 mol of ethanol (C,H OID and 1.6 mol of A)
Q11 B) 078 03 D) 0.22 E) 0.29 31. A finst-order chemical reaction is observed to have a rate
constant of 31 min-, What is the corresponding half-life for the reaction? A) 443s B) 1.4 min C)
1.9s D) 13s E) 45 mitn atm (K mol), I atm- 760 torr) A) 1.70x 10' mmHg thol tatr 40a sampl
comaning 2 9 mol of as a s9 (R00821 B) 1.13 x 10 mmHg C) 8.81 x 101 mmHg D) 6.55 x 10'
mmig E) 8.62 mmHg 33. TheK, value for lad(U) chloride (Pd) is 2.4×io- What is the molar
sol bility oflea401) chloride? 24x 10 mo/l A) 6.0x 10 mol/L 7.7x10-"mol/L D) E) B) C) 3.9 x
102 mol/L 6.2 × 10-2 mol/L
Solution
27. Removing NO or Br2 would shift the reaction to the right because changing the
concentration of an ingredient will shift the equilibrium to the side that would reduce that change
in concentration.
A decrease in pressure due to increasing volume causes the reaction to shift to the side with more
moles of gas. There is no effect on a reaction where the number of moles of gas is the same on
each side of the chemical equation.
Therefore, increasing volume will have no effect.
Answer: A. Decrease in temperature
As the reaction is endothermic (delta H is positive), increase in temperature increases the K value
hence according to Le-Chatelier's principle, to reduce the change in K to normal, reaction shifts
to the left.
