Equilibrium Expression (Kc)

For the reaction...
SO₂ + O₂  <=>  SO₃
If the concentration of SO₂ is increased, the equilibrium position of the reaction will shift ___________.

• to the left
• to the right
• to the left and right 
• neither left nor right

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

What is the K_c expression for this reaction?
   2 NO_(g)  +  O_2(g) ⇌  2 NO_2(g)

• K_c = [NO₂]² / [NO]² [O₂]
• K_c =  [NO]² [O₂] / [NO₂]²
• K_c = [NO]² [O₂] [NO₂]²
• K_c = [NO₂]² / [NO]² +  [O₂]

Tags

NGSS.HS-PS1-7

What are [A] and [B]?

• concentration of reactants
• concentration of products
• energy of reactants
• energy of products

Tags

NGSS.HS-PS1-5

N₂O₄(g) ↔ 2 NO₂(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 = [NO₂]/[N₂O₄]²

Consider the following reaction. What would be the equilibrium constant expression?
4Br₂(g) + CH₄(g) ↔  4HBr(g) + CBr₄(g)

• [Br₂]⁴  [CH₄]/ [HBr]⁴  [CBr₄]
• [HBr]⁴ [CBr₄]/ [Br₂]⁴ [CH₄]
• [HBr ]/ [Br₂]⁴ [CH₄]
• [HBr]⁴ [CBr₄]/ [Br₂]⁴ [CH]⁴

What is the reaction/equation for this K_c expression_

• 2N₂ + O₂ ⇌ 2NO

• N₂ + O₂ ⇌ NO

• NO ⇌ 2NO

• N₂ + O₂ ⇌ 2NO

Tags

NGSS.HS-PS1-7

What is the equation/reaction for this Kc expression?

• O₃ ⇌ 3O₂

• 2O₃ ⇌ 3O₂

• 2O₃ ⇌ O₂

• 3O₂ ⇌ 2O₃

The Kc expression for the reaction 2NH₃ ⇌ N₂ + 3H₂

• 
• 
• 
• 

Tags

NGSS.HS-PS1-7

At equilibrium, the concentrations of the products and reactants are constant over time.

• True
• False

At equilibrium...

• Only the forward reaction is occurring
• Only the reverse reaction is occurring
• Both the forward and reverse reaction are occurring
• Neither reaction is occurring