Investigating the rate of reaction between Sodium Thiosulphate and Hydrochloric Acid
Diagram
Aim : We did 4 experiments to give away out how the rate of reaction changes with differing ingresss of Sodium Thiosulphate, Hydrochloric Acid and pissing. As an inert and stable liquid, water was utilise to alter concentration of Sodium Thiosulphate without changing the end heart of dissolving agent. All the atoms in a water molecule have a proficient outer shell, so they would not react with the other chemicals.
Equipment : Beakers,
Measuring cylinders
Clamp support and Clamps
Black paper tube
Light probe and Blue box
Datalogger
Lamp
Total of 30cm3 H 0, 50cm3 Na S O , 12cm3 HCl
Method : We motiveed to change the concentration of Sodium Thiosulphate and Hydrochloric Acid, just without changing the overall quantities. To do this, the Sodium Thiosulphate and water were interracial at different ratios, with always a constant amount of acid. The table down the stairs shows the 4 different experiments, and what each solution composed of. The Graph column relates to the graphs taken from the Datalogger for that experiment, which are included at the back of this piece.
Sodium Thio-sulphate (cm3) Â Â Â Â Â Â Â Â Water (cm3) Â Â Â Â Â Â Â Â Hydrochloric Acid (cm3) Â Â Â Â Â Â Â Â Graph number
20 Â Â Â Â Â Â Â Â 0 Â Â Â Â Â Â Â Â 3 Â Â Â Â Â Â Â Â DPPAS_02
15 Â Â Â Â Â Â Â Â 5 Â Â Â Â Â Â Â Â 3 Â Â Â Â Â Â Â Â DPPAS_03
10 Â Â Â Â Â Â Â Â 10 Â Â Â Â Â Â Â Â 3 Â Â Â Â Â Â Â Â DPPAS_04
5 Â Â Â Â Â Â Â Â 15 Â Â Â Â Â Â Â Â 3 Â Â Â Â Â Â Â Â DPPAS_05
We did not do the experiment in which 0cm3 Sodium Thiosulphate and 20cm3 water were used, as in that respect would have been no reaction. In sum up, there were always 20cm3 of water and Sodium Thiosulphate, with 3cm3 Hydrochloric Acid, giving a total solution of 23cm3
The black tube was put around and below the beaker to help prevent any unwanted light from entry the light probe, as this would have impaired our results.
The reason we used a Datalogger and light probe instead of the old cross...
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