A concentrated solution A dilute solution
Table of results:
Theory:
There are fast reactions and also slow reactions. For example toasting a piece of bread would take about two minutes and lighting a match up would take 2 seconds.
Chemical reactions occur when particles collide with enough energy to form new substances. The rate of reactions can be increased by increasing the temperature or concentration. For solids the rate of reaction can be increased by increased the surface area. The rate of reaction can be found measuring the volume or mass of gas at intervals over a period of time.
Kinetic Theory
The Kinetic Theory tells us that there are three states of matter, which are solid, liquid and gas.
All matter is made up of ting particles that are constantly moving. The particles in a gas are moving very fast (they have a lot of kinetic energy) and are a great distance apart. The particles in a liquid are moving more slowly and are closer tighter. In a solid the particles are very close together are ‘vibrating’ rather than moving freely.
SOLID LIQUID GAS
Particles can Vitiate. Particles are free to move Particles are free to
provided they stay close to each move any where.
other.
Collision Theory
The collision Theory tells us that in a reaction between two reactants, A + B forming products C + D.
A + B C +D
(Reactants) (Products)
Their particles must collide.
Some collisions will be successful energy in the collision to break existing bonds before new bonds can be formed, if a collision is to be successful and result in products. This minimum amount of energy need for this is called Activation energy. If there is no sufficient energy upon collision/ impact, the recant particles will simply bounce off one another resulting in an unsuccessful collision.
Subsisting
Unsuccessful Collision Successful Collision
The energy on impact is less than The energy on impact is greater than the
the activation energy. activation energy.
