HC Unit 13 Equilibrium Review (Ch 17)

The collision model for chemical reactions explains that what must "collide" for a reaction to occur?

• Atoms or molecules

• Electrons

• Neutrons

• Protons

Tags

NGSS.HS-PS1-5

Activation energy is defined as:

• The minimum amount of energy required to start a chemical reaction.

• The energy released during a chemical reaction.

• The total energy of the reactants.

• The maximum amount of energy required to start a chemical reaction.

Tags

NGSS.HS-PS3-1

A catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. What do we call a biologic catalyst?

• Enzyme

• Hormone

• Vitamin

• Substrate

A reaction "has reached a state of chemical equilibrium" when:

• the concentrations of reactants and products are equal

• the forward and reverse reaction rates are equal

• the reaction has stopped completely

• all reactants have been converted to products

Tags

NGSS.HS-PS1-6

The equilibrium position in a chemical reaction refers to:

• The point where the concentrations of reactants and products remain constant.

• The point where all reactants are completely converted to products in a chemical reaction.

• The initial concentrations of reactants and products.

• The maximum rate of reaction.

Tags

NGSS.HS-PS1-6

Homogeneous and heterogeneous equilibria differ in which of the following ways?

• The phases of reactants and products.

• The temperature of reactants and products.

• The enthalpy of formation of reactants and products.

• The concentration of reactants and products.

Le Chatelier’s principle states that if a system at equilibrium is disturbed, the system will:

• Remain unchanged

• Shift to counteract the disturbance

• Speed up the reaction

• Stop the reaction completely

Write the equilibrium constant expression for the following reaction: H₂(g) + Br₂(g) ⇌ 2HBr(g)

Tags

NGSS.HS-PS1-7

Write the equilibrium constant expression for the following reaction: SO₂Cl₂(g) ⇌ SO₂(g) + Cl₂(g)

• [SO₂][Cl₂]

  ---

  [SO₂Cl₂]

• [SO₂Cl₂]

  ---

  [SO₂][Cl₂]

• [SO₂Cl₂][SO₂][Cl₂]

• 1

  ---

  [SO₂][Cl₂][SO₂Cl₂]

Write the expression for Ksp for the following sparingly soluble salt: ZnS

• Ksp = [Zn²⁺][S²⁻]

• Ksp = [ZnS]

• Ksp = [Zn²⁺]/[S²⁻]

• Ksp = [Zn²⁺]²[S²⁻]²