PORTAGE LEARNING CHEM 104 EXAMINATION
TEST 2026 FULL QUESTIONS AND VERIFIED
ANSWERS
◉ rate law. Answer: mathematical representation of the changes in the
concentrations of reactants and products through the course of a
chemical reaction
◉ rate f. Answer: forward rate (reactants)
◉ rate r. Answer: reverse rate (products)
◉ t zero. Answer: initial / start time
◉ physical equilibrium. Answer: concentrations of substances at
different, reversible physical states
◉ reaction quotient (Q). Answer: relative amounts of products and
reactants present during a reaction at a particular point in time
◉ equilibrium constant (K). Answer: reaction quotient (Q) at
equilibrium
, ◉ State the relationship between Q and K when a reaction is at chemical
equilibrium. Answer: K=Q
◉ Which direction does a reaction proceed when Qc < Kc. Answer:
forward direction
◉ Which direction does a reaction proceed when Qc > Kc. Answer:
reverse direction
◉ Determine which direction equilibrium will shift in the reaction below
if
1) AgNO3 (aq) is added to the system or 2) if AgBr (s) is added to the
system. Explain your answers.
KBr (s) + AgNO3 (aq) ⇌ KNO3 (aq) + AgBr (s). Answer: 1. Reaction
will shift right/forward because the concentration of a reactant has
increased.
2. Reaction will shift left/reverse because the concentration of a product
has been increased.
◉ Write the equilibrium constant expression (Kc) for the following
heterogeneous equilibrium equations.
1. NaOH (aq) + HCl (aq) ⇌ NaCl (aq) + H2O (l)
TEST 2026 FULL QUESTIONS AND VERIFIED
ANSWERS
◉ rate law. Answer: mathematical representation of the changes in the
concentrations of reactants and products through the course of a
chemical reaction
◉ rate f. Answer: forward rate (reactants)
◉ rate r. Answer: reverse rate (products)
◉ t zero. Answer: initial / start time
◉ physical equilibrium. Answer: concentrations of substances at
different, reversible physical states
◉ reaction quotient (Q). Answer: relative amounts of products and
reactants present during a reaction at a particular point in time
◉ equilibrium constant (K). Answer: reaction quotient (Q) at
equilibrium
, ◉ State the relationship between Q and K when a reaction is at chemical
equilibrium. Answer: K=Q
◉ Which direction does a reaction proceed when Qc < Kc. Answer:
forward direction
◉ Which direction does a reaction proceed when Qc > Kc. Answer:
reverse direction
◉ Determine which direction equilibrium will shift in the reaction below
if
1) AgNO3 (aq) is added to the system or 2) if AgBr (s) is added to the
system. Explain your answers.
KBr (s) + AgNO3 (aq) ⇌ KNO3 (aq) + AgBr (s). Answer: 1. Reaction
will shift right/forward because the concentration of a reactant has
increased.
2. Reaction will shift left/reverse because the concentration of a product
has been increased.
◉ Write the equilibrium constant expression (Kc) for the following
heterogeneous equilibrium equations.
1. NaOH (aq) + HCl (aq) ⇌ NaCl (aq) + H2O (l)
