o that by investigating three different reactions.
             When the concentration is altered the equilibrium shifts to the opposite side.
             Potassium dichromate K2Cr2O7
             Copper (II) sulphate pentahydrate CuSO4 * 5H2O
             We put 5 cm3 of a 0.1M potassium dichromate solution into a test tube. That is, we take 10 ml of distilled water and according to calculations, we put 0.3g of K2Cr2O7.
             Then by using a pipette, we add drop by drop 1.0M NaOH, that we make by adding 0.4g of NaOH to 10 ml of distilled water, until the color of the solution changes. Afterwards, we repeat the same process, but this time we add to the solution 1.0M HCl, that we make by adding 0.36g of hydrogen chloride t
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