Higher Chemistry - Unit 3 - Equilibrium

Equilibrium is a __________ process

• Static
• Dynamic
• Probabilistic
• Fictitious

At equilibrium the concentration of all species in the reaction is _________.

• Constant
• Increasing
• Decreasing
• Oscillating

Tags

NGSS.HS-PS1-7

The idea that when a system at equilibrium is stressed, it will react to relieve that stress and return to equilibrium is known as:

• Boyle's Law
• Le Chatelier's Principle
• Charles Law
• Denninger's Law

At what time the reaction reached equilibrium?

• t₁
• t₂
• t₃
• t₄

Increasing the temperature on a ________ reaction will increase the concentration of products.

• Endothermic
• Exothermic
• Isothermic

Tags

NGSS.HS-PS1-5

Decreasing the temperature of an exothermic reaction will shift the reaction to the ________ 

• left
• right

Tags

NGSS.HS-PS1-6

This symbol indicates that a reaction is ____________

• reversible
• irreversible

Tags

NGSS.HS-PS1-6

When the system X + 2 Y <=> Z has reached equilibrium, which of the following is TRUE?

• Forward reaction and Backward reaction stop.
• Forward reaction has sped up and backward reaction has slowed down.
• Forward and backward reactions occur at the same rate.
• Forward reaction has slowed down and backward reaction has sped up.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

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

For the reaction...
N₂  +  O₂  <=>  2NO
If  O₂ is removed, the  concentration of N₂ will _______.

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6