Equilibrium -Law of mass action

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

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

Tags

NGSS.HS-PS1-6

At elevated temperatures ammonium carbonate, NH₂COONH₄, is in equilibrium with NH₃ and CO₂ according to the equation;

NH₂COONH₄(s) ↔ 2 NH₃(g) + CO₂(g)

What is the equilibrium expression for this reaction?

• K = 2 [NH₃][CO₂]

  [NH₂COONH₄]

• K = [NH₃]²[CO₂]

  [NH₂COONH₄]

• K = 2 [NH₃][CO₂]

• K = [NH₃]²[CO₂]

Tags

NGSS.HS-PS1-6

What is the equilibrium-constant expression for

CO₂(g) + H₂(g) ↔ CO(g) + H₂O(l)

• K= [CO][H₂O] / [CO₂][H₂]

• K= [CO₂][H₂] / [CO]

• K= [CO₂][H₂] / [CO][H₂O]

• K= [CO] / [CO₂][H₂]

What is [A] and [B]?

• Concentration of Reactants
• Concentration of Products
• Energy of Reactants
• Energy of Products

Tags

NGSS.HS-PS1-5

When K_eq > 1, 

• There are more products than reactants when the reaction reached equilibrium.
• There are more reactant than products when the reaction reached equilibrium.
• The amount of reactants is equal to the amount of products.

N₂O₄(g) ⇌ 2NO₂(g)
What is the concentration equilibrium constant expression?

• K_c = [NO₂]² / [N₂O₄]
• K_c = [N₂O₄] /[ NO₂]²
• K_c = [N₂O₄]² / [NO₂]
• K_c = [N₂O₄] x [NO₂]²

Tags

NGSS.HS-PS1-7

What is the correct equilibrium expression for the following reaction:
2H₂O₂(aq) ↔ 2H₂O(l) + O₂(g)

• [H₂O]²[O₂] / [H₂O₂]²
• [H₂O₂]² / [H₂O]²[O₂]
• [O₂] / [H₂O₂]²
• [H₂O]² / [H₂O₂]²

Tags

NGSS.HS-PS1-7