Reaction Rates and Equilibrium Review

A complete reaction is in which:

• All the reactants convert into products

• All the reactants do not convert into products

• Half reactants convert into products

• only 10% reactants convert into products

Tags

NGSS.HS-PS1-7

For the reaction... H_{2 (g)} + Cl_{2 (g)} <=> 2HCl _(g) + heat

• This is a heterogeneous equilibrium, concentrations of all reactants and products will be included in the equilibrium constant equation.

• This is a homogeneous equilibrium, concentrations of all reactants and products will not be included in the equilibrium constant equation.

• This is a heterogeneous equilibrium, concentrations of all reactants and products will not be included in the equilibrium constant equation.

• This is a homogeneous equilibrium, concentrations of all reactants and products will be included in the equilibrium constant equation.

For the reversible physical process:

AgNO3(s) <=> Ag(aq) + NO3(aq) ...

• This is a heterogeneous equilibrium, concentrations of all reactants and products will be included in the equilibrium constant equation.

• This is a heterogeneous equilibrium, concentrations of all reactants and products will not be included in the equilibrium constant equation.

• This is a homogeneous equilibrium, concentrations of all reactants and products will not be included in the equilibrium constant equation.

• This is a homogeneous equilibrium, concentrations of all reactants and products will be included in the equilibrium constant equation.

At what time the reaction reached equilibrium?

• t₁

• t₂

• t₃

• t₄

Tags

NGSS.HS-PS1-5

Which of the following would speed up a reaction?

• Using lumps instead of powder

• Increasing the concentration of an acid

• Decreasing the temperature

Tags

NGSS.HS-PS1-5

Which of the following will increase the proportion of successful collisions?

• Increasing the temperature

• Increasing the pressure

• Increasing the concentration

Tags

NGSS.HS-PS1-5

What term is used to describe a chemical reaction in which the forward and reverse reaction rates are the same?

• A static equilibrium

• An equal equilibrium

• A dynamic equilibrium

When a reversible reaction is at equilibrium, which of these statements is true?

• The concentration of products is greater than the concentration of reactants

• The concentration of products remains constant over time

• The concentration of products is equal to the concentration of reactants

What is the effect of decreasing the pressure on the following equilibrium 2NO(g) + O₂(g) ⇌ 2NO₂(g)?

• Less NO₂ will be produced

• Less NO and O₂ is formed

• No change will occur

What effect on the equilibrium position is produced by adding a catalyst to a system in equilibrium?

• It decreases the yield of product

• It increases the yield of products

• It has no effect