AP Chemistry Equilibrium PRE/POST Test

For the reaction...
SO₂ + O₂ <−>  SO₃
If the equilibrium shifts to the right, the concentration of O₂ will ___________.

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

For the reaction...
SO₂ + O₂ <−>  SO₃
If the concentration of O₂ is decreased, the equilibrium of the reaction will shift ___________.

• left
• right
• left and right
• neither left nor right

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Which of the following is NOT true at equilibrium?

• The forward and reverse reactions proceed at the same rate.
• The concentrations of reactants and products do not change.
• The concentration of the reactants is equal to the concentration of the products.
• The forward and reverse reactions continue to occur.

Tags

NGSS.HS-PS1-6

What is the equilibrium expression for:
Fe₃O₄(s) + 4H₂(g) <--> 3Fe(s) + 4H₂O(g)

• ([Fe]³[H₂O]⁴ ) / ([Fe₃O₄][H₂]⁴)
• ([Fe₃O₄][H₂]⁴)/ ([Fe]³[H₂O]⁴)
• [H₂O]⁴ / [H₂]⁴
• ([Fe][H₂O]) / ([Fe₃O₄][H₂])

Consider the following equation: CO_(g) + 2H_2(g) ⇌ CH₃OH_(g) + Heat

Which of the factors below would decrease the concentration of CH₃OH at equilibrium?

• adding CO

• incresing H₂

• decrease in the temperature

• increasing the temperature

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Predict the effect of decreasing the volume of the container on the following reaction: 
2NH₃(g) ⇋ N₂(g) + 3H₂(g) 

• shift left
• shift right
• no change 
• all the above

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

What is the proper K_eq for the following reaction? 
   2 NO_(g)  +  O_2(g) ⇌2 NO_2(g)

• K_eq = [NO₂]² / [NO]²[O₂]
• K_eq =  [NO]²[O₂] / [NO₂]²
• K_eq = [NO]²[O₂][NO₂]²
• K_eq = 2[NO][O₂] / 2[NO₂]

Tags

NGSS.HS-PS1-6

What are [A] and [B]?

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

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

For reaction a<-- --> b. Use the graph to determine what the Keq will be.

• K > 1

• K < 1

• K = 1

• Not enough information

Tags

NGSS.HS-PS1-6

(Calculator Allowed) What is [H₂O] if K = 1.2,

[CO₂] = 0.846M, & [CH₄]= 0.0713M?

4CuO_(s)+CH_4(g)↔CO_2(g)+4Cu_(s) +2H₂O_(g)

• 0.101 M

• 0.318 M

• 0.0102 M

• 3.77 M

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-7