Ejigu

What is the definition of a chemical equilibrium?

• A state where reactants and products are consumed at the same rate

• A state where reactants and products have equal concentrations

• A state where reactants and products do not change with time

• A state where reactants and products are formed at the same rate

What is the equilibrium constant for a reversible reaction represented by A + B ↔ M + N?

• Kf

• Kp

• Kb

• Kc

What is the pH of a neutral solution?

• 9

• 6

• 7

• 8

Which acid-base theory defines an acid as a proton donor?

• Bronsted-Lowry theory

• Amphiprotic theory

• Arrhenius theory

• Lewis theory

What is the common ion effect in a buffer solution?

• Decreases the ionization of weak bases

• Has no effect on the ionization of acids or bases

• Increases the ionization of weak acids

• Suppresses the ionization of weak acids or bases

What is the relationship between pH and pOH in a solution?

• pH + pOH = 1

• pH + pOH = 7

• pH + pOH = 10

• pH + pOH = 14

Which of the following is a common buffer system?

• H2SO4/Na2SO4

• HNO3/NaNO3

• NaOH/KOH

• KCl/HCl

What is the equilibrium constant for the self-ionization of water?

• Kc

• Ka

• Kw

• Kb

What is the pH of a 0.0001 M H+ solution?

• 5

• 6

• 4

• 3

Which acid-base pair forms a buffer solution?

• HNO3/KNO3

• CH3COOH/CH3COONa

• HCl/NaCl

• H2SO4/Na2SO4