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

This symbol indicates that a reaction is ____________

• reversible
• irreversible

Tags

NGSS.HS-PS1-6

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

• Dynamic Equilibrium

• Chemical Balance

• Chemical Constant

• Chemical Reaction

At what time the reaction reached equilibrium?

• t₁
• t₂
• t₃
• t₄

Tags

NGSS.HS-PS1-6

It is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back.

• reversible reaction
• irreversible reaction
• decomposition reaction
• synthesis

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

Define chemical equilibrium.

• A reaction is reversible.
• The concentration of the reactants is equal to the concentration of the products.
• The rate of a forward reaction is equal to the rate of the reverse reaction.
• The reaction stops and no further change in concentration occurs.

Tags

NGSS.HS-PS1-6

At what time (in seconds) is equilibrium established?

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

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Which of the two graphs reaches equilibrium?

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

Tags

NGSS.HS-PS1-6

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

• the same 
• unequal
• unequal for exothermic reactions
• unequal for endothermic reactions

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6