Solutions and Equilibrium

This symbol indicates that a reaction is:

• reversible

• not reversible

Tags

NGSS.HS-PS1-6

At what time does the reaction reach equilibrium?

• t₁

• t₂

• t₃

• t₄

During equilibrium, the rates of the forward and the reverse reaction are ________

• the same 
• unequal
• unequal for exothermic reactions
• unequal for endothermic reactions

Tags

NGSS.HS-PS1-6

Which is the correct equilibrium constant expression for the reaction 
CaCO_3(s) ⇋ CaO_(s) + CO_2(g)

• [CaO]/[CO₂]
• [CO₂]
• 1/[CO₂]
• [CO₂][CaO] / [CaCO₃

Tags

NGSS.HS-PS1-6

What states of matter are included when calculating K_c?

• Solids and Liquids

• Aqueous and Gas

• Solids, Liquids, Aqueous solutions and Gases

• Aqueous Solutions & Liquids

What is the proper K_c for the following 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 = 2[NO][O₂] / 2[NO₂]

Given the equation representing a reaction:
N₂O_4(g) ↔ 2NO_2(g)

Which statement describes this reaction at equilibrium?

• The concentration of N₂O₄(g) must equal the concentration of NO₂(g).
• The concentration of N₂O₄(g) and the concentration of NO₂(g) must be constant.
•  The rate of the forward reaction is greater than the rate of the reverse reaction.
• The rate of the reverse reaction is greater than the rate of the forward reaction.

What is the correct formula for the equilibrium constant

Which of the two graphs reaches equilibrium?

• The left one.
• The right one.
• Both of them.
• Neither.

What is [A] and [B]?

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

Tags

NGSS.HS-PS1-5