The Factors Controlling the Rate of the
Sodium Thiosulphate and Acid Reaction
Planning
I am investigating the factors controlling the rate of thiosulphate /
acid reaction. The reaction that will be taking place will follow the
rate at which sulphur is formed in the reaction of sodium thiosulphate
with dilute hydrochloric acid. In the experiment the sulphur will
appear as an extremely fine precipitate. This will slowly be followed
by a milky appearance in the reaction mixture in the conical flask. As
the amount of the sulphur in the mixture increases, the precipitate
will become milkier. Gradually the liquid will become more and more
opaque. To investigate the rate of the reaction, we will use the cross
idea. A cross will be placed under the conical flask and when it
cannot be seen anymore, because the liquid is opaque, I will know that
the reaction is completed. In the experiment I will change the
thiosulphate concentration but I will keep the temperature and
concentration of hydrochloric acid constant at all times.
The equation for the experiment is as simple as the experiment:
[IMAGE]Na2S2O3(aq) + 2HCL(aq) S(s) + S02(g) + 2NaCl(aq) + H20(I)
There are five factors that will affect the rate of a given reaction,
however, only two of these needs to be considered in this experiment.
These five factors are temperature, concentration, surface area,
pressure and catalysts. Only the effect of a change in concentration
and temperature will change the rate. The surface area would only be a
factor in an experiment when a reagent is a solid and so the reaction
had taken place between a gas/solid or a solution/solid and the two
reag...
... middle of paper ...
... reaction has finished and the solution is opaque.
Ø When the liquids have been measured one should find the conical
flask with the mark on it and clamp it with a clamp to the water bath.
[IMAGE]
[IMAGE] Water Bath
[IMAGE] Conical Flask
[IMAGE]
Ø Pour all the liquids into the conical flask and make sure that the
HCL goes in last as the HCL starts the reaction.
Ø Just in case one should place a thermometer into the water bath just
to monitor the temperature.
Ø Finally one may start the clock and note down the results in a neat
table.
Ø Note that one must do this experiment at various temperatures. So
for example for this experiment I am going to use the temperatures 10
degrees, 20 degrees, room temperature, 30 degrees, and 40 degrees. I
will repeat the experiment twice more.
Count the number of heartbeats in 15 seconds by tapping a pencil on a piece of paper.
How am I going to make it a fair test I will use a clean flask for
4. Pour about 300mL of tap water into the beaker. Set up a hot-water bath using a hot plate, retort stand, and thermometer clamp. Alternatively, use a Bunsen burner, retort stand, ring clamp, thermometer clamp, and wire gauze.
Hydrochloric Acid, Sodium Thiosulphate Reaction. Research: What is the difference between Hydrochloric acid is a strong colourless acid formed when hydrogen chloride gas dissociates in water, used in industrial and laboratory. processes. The.
Investigating the Factors Influencing the Rate of Reaction Between Sodium Thiosulphate and Dilute Hydrochloric Acid
The Effect of Temperature on the Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid
Any remaining carbon is to be cleaned off the beaker so that the flame can easily heat the water. Exactly 100ml of water is to be used. The length of the wick on the spirit burner must be the same. The height of the burner from the beaker (the brick height) must be the same. The beaker must stay the same shape as well because if it is not the flame may have more surface area where to heat the water.
Start with the hot water and first measure the temperature. Record it. 8. Then pour 40 ml into the beaker. You can measure how much water was used by looking at the meniscus.
take about 30 minutes for the water to cool down 20ºC, which is why I
The Arrhenius equation ln k = ln A – (Ea / RT) can be shown
The Effect of Sodium Thiosulphate Solution on the Rate of its Reaction with Hydrochloric Acid
Effect of Temperature on the Rate of Reaction between Sodium Thiosulphate and Hydrochloric Acid Investigation Chemical reactions are used in our everyday life, they literally keep us alive. They are used in food, respiration and everywhere else in the environment. A chemical reaction mainly occurs when reactants react together to produce a new product. The speed at which this reaction takes place is called the rate of reaction. The product produced has a number of particles in the solution that has formed from the reactants.
from 10cm to 50cm to make it easier to see the difference in a graph.
The Effect of Temperature on the Rate of Reaction of Sodium Thiosulphate and Hydrochloric Acid
Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid. Aim Investigation, to find out how 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.