Equilibrium

This symbol indicates that a reaction is ____________

• reversible
• irreversible

Tags

NGSS.HS-PS1-6

At what time the reaction reached equilibrium?

• t₁
• t₂
• t₃
• t₄

Tags

NGSS.HS-PS1-6

Identify the labels (a) and (b) on the graph.

• a is concentration of reactants and b is the concentration of product
• a is concentration of product and b is the concentration of reactant
• a is the volume of reactants and b is the volume of product
• a the mass of reactants and b is the mass of product

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Which of the following is NOT true at equilibrium?

• The forward and reverse reactions proceed at the same rate.
• The concentrations of reactants and products do not change.
• The concentration of the reactants is equal to the concentration of the products.
• The forward and reverse reactions continue to occur.

Tags

NGSS.HS-PS1-6

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

• Forward reaction rate is faster than the reverse and concentrations are equal
• Forward and reverse reaction rates are equal and concentration is constant
• Forward and revers reaction rates are equal and concentration is equal
• Forward reaction rate is faster than the reverse and concentration is equal

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

What occurs when a reaction reaches equilibrium?

• The concentration of the reactants increases.

• The concentration of the products increases.

• The rate of the forward reaction is equal to the rate of the reverse reaction.

• The rate of the forward reaction is slower than the rate of the reverse reaction.

The graph shows that the reaction is at equilibrium after 60 seconds because the concentration of both NO₂(g) and N₂O₄(g) are

• increasing

• decreasing

• constant

• equal

Which type or types of change, if any, can reach equilibrium?

• a chemical change, only

• a physical change, only

• both a chemical and a physical change

• neither a chemical nor a physical change

Which equation represents a chemical equilibrium?

• N₂ (l) ↔ N₂ (g)

• 2NO₂ (g) ↔ N₂O₄ (g)

• CO₂ (s) ↔ CO₂ (g)

• NH₃ (g) ↔ NH₃ (l)

A chemical reaction is at equilibrium. Compared to the rate of the forward reaction, the rate of the reverse reaction is

• faster and more reactant is produced

• faster and more product is produced

• the same and the reaction has stopped

• the same and the reaction continues in both directions