Chemestry on sodiumthiosulphate turning hydrochloric acid milk.

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…have a light bulb and a light sensor then you would no exactly when the reaction had got to the point where you can no longer see through it. Extend I could extend the experiment by having bigger quantities of the solution. On the other hand, I could change the variable. Alternatively, I could put the experiment into a water bath and see if changing the temperature the changes the out come of the experiment.