Dynamic Equilibrium

Around what time does the reaction reach equilibrium?

• 25 min

• 70 min

• 45 min

• 80 min

Tags

NGSS.HS-PS1-5

Which of the following is NOT true at equilibrium?

• The concentrations of reactants and products do not change.

• The forward and reverse reactions proceed at the same rate.

• 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

The following factors affect the position of equilibrium EXCEPT

• Concentration

• State of Matter

• Temperature

• Pressure

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.

What is the K_eq 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]

The following reaction :

SO_{2 (g)} + NO_{2 (g)} ⇌ SO_{3 (g)} + NO (g)

established equilibrium and was found to contain

0.40 M SO₃ , 0.30 M NO,

0.15 M NO₂ , and 0.20 M SO₂.

Calculate the equilibrium constant for this reaction.

• 4.0

• .42

• .25

• 1.0

Calculate [H₂O] if K_eq = 1.2,

[CO₂] = 0.846M, and [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-PS3-1

A chemical reaction in which products can react to re-form reactants is known as a(n)

• reforming reaction

• reversible reaction.

• buffered reaction

• stoichiometric reaction.

Tags

NGSS.HS-PS1-6

What is dynamic equilibrium?

• The reaction goes forward

• The reaction goes backward

• The rate of forward and backward reaction is equal

• The equilibrium is dynamite

What would be the effect of decreasing the concentration of the reactant on the position of the equilibrium?

• equilibrium shifts to the left

• equilibrium shifts to the right

• no change in position of equilibrium

Tags

NGSS.HS-PS1-5