Chemical Equilibrium 2024

static equilibrium

• condition of continuous, random movement of particles but no overall change in concentration of materials
• the reaction that forms reactants from products
• a condition where the reaction occurring in a system is completely halted and there exists no movement between the reactants and the products corresponding to the chemical reaction
• a measurement of how much solute exists within a certain volume of solvent or solution

dynamic equilibrium

• condition of continuous, random movement of particles but no overall change in concentration of materials
• the process by which one or more substances change to produce one or more different substances
• a condition where the reaction occurring in a system is completely halted and there exists no movement between the reactants and the products corresponding to the chemical reaction
• a substance that takes part in and undergoes change in a chemical reaction

What are the two factors to look for when determining if the reaction is at equilibrium?

• Forward reaction rate is faster than the reverse reaction rate and amounts of reactants are greater than the products

• Forward and reverse reaction rates are equal and amounts of reactants and products are constant

• Forward reaction rate is slower than the reverse reaction rate and amounts of reactants are greater than the products

• Forward reaction rate is faster than the reverse reaction rate and amounts of products are greater than the reactants

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in

• Chemical Equilibrium
• Chemical Balance
• Chemical Constant
• Chemical Reaction

At what time does the reaction reach equilibrium?

• t₁
• t₂
• t₃
• t₄

It is a chemical reaction where the reactants form products and the products form reactants.

• reversible reaction

• nonreversible reaction

• decomposition reaction

• standard reaction

At what time (in seconds) is equilibrium established?

• 0 seconds
• 1 second
• 5 seconds
• 10 seconds

Which of the two graphs reaches equilibrium?

• The left one.
• The right one.
• Both of them.
• Neither.

Which of the following is NOT true at equilibrium?

• The forward and reverse reactions proceed at the same rate.

• The amount (concentration) of reactants and products do not change.

• The amount (concentration) of the reactants is equal to the concentration of the products.

• The forward and reverse reactions continue to occur.

During equilibrium, the rates of the forward and the reverse reaction are ________

• equal

• unequal

• unequal for exothermic reactions

• unequal for endothermic reactions