(a.) 1st warm/cold temperature (meaning, the change in temperature).

(b.) 2nd different concentration of a particular solution in one-an-other.

(c.) 3rd and adding catalyst to a solution.

During this Lab work we conducted experiments that helped us to find what and how is a solutions reaction rate effected by the change of temperature and different concentration.

There was a very important thing to notice:

Na2S2O3 + 2HCl  S + SO2 + 2NaCl + H2O

Is that after hydrochloric acid is added to sodium thiosulphate and they react with each other, the solution that is formed is turbid even tough both of the substances were transparent before. That occurs because this sulphur that is realised does not solute in that particular substance.

After we placed the beaker on the paper with the drawn cross, as soon as we added the hydrochloric acid (which was constant; 1ml no mater what the other ratio were) we started the stopwatch. Till the water became so turbid that you couldn't see the cross the stopwatch. When it did become turbid we stooped the watch and recorded our data. As I wrote before in the beginning of this lab report sulphur is produced which can not be solitude in water so the end the substance is turbid.

Some topics in this essay:
H2O IV, , ANALYZING RESULTS, Na2S2O3 H2O, HCl III, Na2S2O3 II, reaction rate, hypothesis temperature faster, na2s2o3 dense solution, concentration na2s2o3 dense, temperature faster reaction, hypothesis temperature, concentration na2s2o3, faster reaction, temperature faster, faster reaction rate, na2s2o3 dense, dense solution, hydrochloric acid, results approximately, sodium thiosulphate,