Why heat oxalic acid 60-70°C while titrating against KMnO4?
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We heat the titration flask containing oxalic acid to about 60-70 degree Celsius and then titrate it against KMnO4 because----
1) All reactions require activation energy and thecorrect orientation. If you do not heat the mixture, the reactants won't have enough activation energy (in a short time) to start the reaction even they are in the correct orientation. However, if you heat, the heat energy gained by particles convert it to kinetic energy, so they move with higher speed. This results in higher frequency of collision among the particles, so, increased frequency of effective collision. Thus, rate of reaction increases and you will be able to obtain your results in a shorter time. ( Effective collision means success of reaction, i.e. products formed)
2) If the temperature is too low (below 55 degrees celsius), the interaction between the oxalate and the potassium permangante will move too slowas to be used as a practical lab experiment.
3) Above 60 degrees celsius, oxalate acid begins to decompose, so its important to stay in this range. areound 100 degree celcius, Oxalic acid may decompose to give CO2 & CO.
1) All reactions require activation energy and thecorrect orientation. If you do not heat the mixture, the reactants won't have enough activation energy (in a short time) to start the reaction even they are in the correct orientation. However, if you heat, the heat energy gained by particles convert it to kinetic energy, so they move with higher speed. This results in higher frequency of collision among the particles, so, increased frequency of effective collision. Thus, rate of reaction increases and you will be able to obtain your results in a shorter time. ( Effective collision means success of reaction, i.e. products formed)
2) If the temperature is too low (below 55 degrees celsius), the interaction between the oxalate and the potassium permangante will move too slowas to be used as a practical lab experiment.
3) Above 60 degrees celsius, oxalate acid begins to decompose, so its important to stay in this range. areound 100 degree celcius, Oxalic acid may decompose to give CO2 & CO.
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