Rate Of Reaction

Question 1

Rate of reaction

Answer 1

The change in the concentration over a certain period of time

Question 2

Catalyst

Answer 2

A substance that lowers the activation energy of a reactiomn by providing an alterntate pathway for the reaction

Question 3

Activation energy

Answer 3

The minumim amount of energy needed to start a reaction

Question 4

Concentration

Answer 4

The number of molecules in a substance per unit of volume

Question 5

Enzyme

Answer 5

A biological catalyst that speeds up a chemical reaction

Question 6

What does rate of reactiom depend on?

Answer 6

The frequency of collisions between particles & the energy with which they collide

Question 7

What happens if particles collide with less energy than the activation energy?

Answer 7

The particles will just bounce off each other

Question 8

What affects rate of reaction

Answer 8

• Temperature
• Concentration (dissolved reactants) / Pressure (gaseous reactants)
• Surface area
• Use of Catalyst

Question 9

Rate of reaction formula

Answer 9

Rate of reaction = amount of product formed or reactant used up / time