Equilibrium

How do you work out mean rate of reaction?

↳ Quantity of reactant used ÷ time taken

↳ Quantity of product formed ÷time taken

How do you work out rate?

↳ Place the reaction mixture on a scale

↳ As the reaction happens the gaseous product is given off therefore the mass of the flask will decrease

↳ Rate (g/s) = change in mass (g) ÷ time taken (s)

Why does larger surface area increase rate of reaction?

↳ More reactant particles are exposed so higher collision frequency

What do catalysts do (2)?

↳ Provide a different reaction pathway that has lower activation energy

↳ More particles will collide with enough energy

PHOTO I MAKE

What is a reversible reaction?

↳ Products can react together to produce the original reactants again with the same amount of energy

What happens in a closed system?

↳ No reactants or products can escape

↳ If a reversible reaction is carried out then it will reach dynamic equilibrium (forward and reverse reactions happen at the same rate)

↳ The amount of reactants and products are constant but not always equal