Equilibrium describes the balance that results from a forward and reverse reaction proceeding at equal rates. Since reaction rates depend on concentration, temperature, and pressure, any changes in these conditions may alter the forward and reverse rates unequally and disrupt the equilibrium. Le Chatelier's principle states that after a change in conditions displaces a reaction from equilibrium

a) the reaction will undergo a temperature change in order to offset the disturbance.

b) the reaction proceeds to a new equilibrium in the direction that offsets the change.

c) the disturbance will always cause the forward reaction to be slower than the reverse reaction.

d) the change in conditions must be reversed in order to regain equilibrium.

b) the reaction proceeds to a new equilibrium in the direction that offsets the change.

Explanation:

According to Le Chatelier's principle, when a system experiences a constraint such as a change in pressure, temperature or concentration, the system will readjust itself in order to annul the constraint.

This simply means that when temperature, concentration or pressure is changed, a new equilibrium position is reached in order to offset the changes in the system.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

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