When the forward and backward reaction occur at the same rate.

closed system--> no reactants/ products can escape and nothing can come in.

Does equilibrium occur in an open or closed system?

concentration of PRODUCTS is greater than reactants.

if the equilibrium shifts right, what happens to the concentration?

concentration of REACTANTS is greater than products.

if the equilibrium shifts left, what happens to the concentration?

temperature , pressure and concentration.

what can affect the position of equilibrium?

If you change the conditions of a reversible reaction at equilibrium, the system will try to counteract that change.

if you decrease the temp, equilibrium tries to move to exothermic direction to produce more heat.   If you increase temp, equilibrium moves to endothermic direction to try and decrease it.

If you increase the concentration of REACTANTS, the system decreases it by making more products.   if you decrease the concentration of PRODUCTS, the system increases it by reducing the amount of reactants. 

How does concentration affect equilibrium?

if you increase the pressure, equilibrium reduces it and moves to side with FEWER molecules of gas (side with a larger number of big numbers).   if you decrease the pressure, equilibrium increases it and moves to side with more molecules of gas (higher number of big numbers).

what state of matter does pressure only affect?

English (UK)

this is for aqa gcse combined science higher paper chemistry chapter 6(rate of reaction) equilibrium.

Chem 6- Equilibrium and le chateliers principle.

Flashcards

Chemical Reactions & Equations

The rate and extent of chemical change

GCSE Rates of Reaction

Aqa gcse Chemistr7 revision notes