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  1. AP Chemistry
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Equilibrium

Question 1
college-boardChemistryAPExam Style
1 mark

What must be true for a chemical system to have reached equilibrium?

Question 2
college-boardChemistryAPExam Style
1 mark

What is assumed to be true when calculating an equilibrium constant (K) for a reaction occurring in aqueous solution?

Question 3
college-boardChemistryAPExam Style
1 mark

In carbonated beverages, CO_2 dissolves in water forming carbonic acid; what role does understanding its K_c play in packaging these drinks?

Question 4
college-boardChemistryAPExam Style
1 mark

Which quantity is represented by the lowercase letter "k" in chemical equilibrium expressions?

Question 5
college-boardChemistryAPExam Style
1 mark

If the rate constants for the forward and backward reactions are represented by kf and kr respectively, how significant is the ratio of kf/kr in calculating the value of K for an equilibrating system?

Question 6
college-boardChemistryAPExam Style
1 mark

Iodine is reacted with chlorine gas in order to form iodine monochloride with the following equation: I₂(s) +Cl₂(g) ⇌ 2ICl (g) . It is found that it occurs in a 2.0 L container, and that the reaction has now reached equilibrium. There is known to be 55 grams of solid iodine as well as a concentration of Cl₂ being 1.5*1...

Question 7
college-boardChemistryAPExam Style
1 mark

If a reaction A + B ⇌ C has an equilibrium constant (K) value greater than 1, which direction is favored at equilibrium?

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Question 8
college-boardChemistryAPExam Style
1 mark

In a balanced chemical equation used to calculate K, what do the exponents on concentration terms represent?

Question 9
college-boardChemistryAPExam Style
1 mark

If a mixture containing SOCl_2(g) and Cl_2(g) at equilibrium was found to have a decreased [SOCl_2] after increasing volume at constant temperature, what could be inferred about Δn_g for this system?

Question 10
college-boardChemistryAPExam Style
1 mark

Given the balanced chemical equation 2 NO₂(g) + H₂O(l) → HNO₃(aq) + HNO₂(aq), which species is the limiting reactant when 2 moles of NO₂ and 1 mole of H₂O are combined?