How do concentration and temperature affect the rate of a chemical reaction between magnesium and hydrochloric acid?
by
aleenp (student)
How do concentration and temperature affect the rate of a chemical reaction?
Collision theory:-
Chemists believe that the theory explains how the various factors affect reaction rates. It is believed that molecules are only able to react if they bump into each other. When molecules are colliding with each other it can lead to other theory’s affecting this such as concentration, temperature and catalysts. The theory states that when molecules are colliding with one another atoms can break and new bonds form creating new molecules. There are molecules in gases and liquids which are always in constant motion colliding in millions. Many reactions are not successful only some are successful and this is because some reactions have collisions in which the molecules are moving around giving the bonds the strength to break (activation energy). If you increase the concentration of the reactions and the temperature it brings more collision and therefore the success rate is higher increasing the rate of reaction. If there is a catalyst present the collision between the molecules, requires less energy for the chemical change to take place, therefore more collisions have enough energy for the reaction to occur, which in term increase the reaction rate.
