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Describe an experiment to show the effect of concentration on the rate of the reaction between potassium persuphate and potassium iodide. |
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Answer» Solution :Equation Procedure Tabular column + graph Conclusion Detailed Answer: `K_2S_2O_8 + 2KI to 2K_2SO_4 + I_2` Procedure : Prepare the reaction mixture by mixing 25 ml each of `0.1 N K_2 S_2O_8 + 0.1 N KI` KEPT at `t_1""^@C` and start the STOP clock. At regular intervals of TIME, a sample of the mixture (5 ml) ispipetted into a conical flask containing ice cold WATER and little KI). It is then titrated against `0.1 Na_2 S_2O_3` using starch as indicator (added near the end point). End point is disappearance of blue colour. Volume of `Na_2 S_2O_3` consumed is recorded. Repeat the above procedure by keeping the reactants at `t_2""^@C`  Conclusion: The rate of chemical reaction increases with increase in temperature. |
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