Rate Of Reaction - Sodium Thiosulphate And Hydrochloric Acid
...the rate of reaction between Sodium
Thiosulphate and Hydrochloric acid is affected by changing the
concentration.
Introduction
I must produce a piece of coursework investigating the rate of
reaction, and the effect different changes have on them. The rate of
reaction is the rate of loss of a reactant or the rate of development
of a product during a chemical reaction. It is measured by dividing 1
by the time taken for the reaction to take place. There is five
factors which affect the rate of a reaction, according to the
collision theory of reacting particles: temperature, concentration (of
solution), pressure (in gases), surface area (of solid reactants), and
catalysts. I have chosen to investigate the effect of concentration on
the rate reaction. This is because it is the most practical to
investigate. Dealing with temperatures is a difficult task especially
when we have to keep constant high temperatures. Secondly the rate
equation and the constant k changes when the temperature of the
reaction changes. We have no gases and solids involved therefore it is
easy to deal with solutions. Similarly the use of a catalyst
complicates things, and if used incorrectly could alter the outcome of
the experiment.
The theory behind this experiment is that 'Increasing the
concentration can increase the rate of the reaction by increasing the
rate of molecular collisions.'
GRAPH
I will place the reaction mixture on a paper with a black cross-drawn
on it. When the cross is completely obscured, the reaction will have
finished. The time taken for this to happen is the measure of the rate
of reaction. We must do this several times, and change the
concentration of Sodium Thiosulphate.
The rate of reaction is a measure of the change, which happens during
a reaction in a single unit of time. The things that affect the rate
of reaction are as...
View Full Essay
