Acids, Bases, Buffers

According to Le Châtelier's Principle, what does nature strive to maintain or attain?

• A state of chaos

• A state of equilibrium

• A state of energy

• A state of motion

What happens to the position of equilibrium when the concentration of products is increased?

• Shifts left toward reactants

• Shifts right toward products

• Remains unchanged

• Becomes unpredictable

What is the effect on the equilibrium position when products are removed from the system?

• Shifts left toward reactants

• Shifts right toward products

• No change occurs

• Equilibrium is destroyed

What is the result of adding hydrogen gas (H₂) to the system N₂(g) + 3H₂(g) ⇌ 2NH₃(g) according to the diagram?

• Shifts left and decreases [NH₃]

• Shifts right and increases [NH₃]

• No change in equilibrium

• Shifts right and decreases [NH₃]

According to Le Châtelier's Principle, what happens to an endothermic reaction when the temperature is increased?

• A) The equilibrium shifts to the product side

• B) The equilibrium shifts to the reactant side

• C) No change in equilibrium

• D) The reaction becomes exothermic

What is the effect of decreasing volume on the pressure of a system involving gases according to Le Châtelier's Principle?

• A) Pressure decreases

• B) Pressure remains constant

• C) Pressure increases

• D) Volume has no effect on pressure

What color does the equilibrium mixture turn when the temperature of a CoCl2 + 6H2O mixture is decreased?

• A) Blue

• B) Pink

• C) Green

• D) Yellow

How does the equilibrium position shift when a reactant is removed from a system?

• A) Shifts to the product side

• B) Shifts to the reactant side

• C) No shift occurs

• D) Equilibrium is destroyed

What does the equilibrium constant (K) represent in a chemical system?

• The time it takes to reach equilibrium

• The numerical description of the balance between reactants and products

• The temperature at which the reaction occurs

• The pressure at which all reactions cease

Which statement best describes a system in chemical equilibrium?

• The reactants are completely used up to form the products.

• The concentration of reactants and products remains constant over time.

• All chemical reactions have ceased.

• The system is only influenced by external pressures.