IGCSE Chemistry Chemical Reactions & Equilibrium

Front

What is a chemical reaction?

Back

A process where reactants are transformed into products, involving the breaking and forming of chemical bonds.

Front

What is equilibrium in a chemical reaction?

Back

A state where the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products.

Front

What does Le Chatelier's Principle state?

Back

If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.

Front

What happens when you increase the concentration of a reactant in a reversible reaction?

Back

The equilibrium shifts to the right, favoring the formation of products.

Front

What is the effect of temperature on equilibrium?

Back

Increasing temperature favors the endothermic direction of the reaction, while decreasing temperature favors the exothermic direction.

Front

What is activation energy?

Back

The minimum energy required for a chemical reaction to occur.

Front

How does increasing pressure affect gaseous reactions?

Back

It shifts the equilibrium towards the side with fewer moles of gas.

Front

What are reversible reactions?

Back

Reactions that can proceed in both forward and reverse directions, allowing products to revert to reactants.

Front

What is the difference between a catalyst and an inhibitor?

Back

A catalyst speeds up a reaction without being consumed, while an inhibitor slows down a reaction.

Front

What is the role of temperature in reaction rates?

Back

Higher temperatures increase the kinetic energy of particles, leading to more frequent and effective collisions.