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How do nature of the reactant influence rate of reaction? Nature and state of the reactant: |
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Answer» SOLUTION :We know that a chemical reaction involves breaking ofcertain existing bonds of the reacting and forming new borns which lead to the product. The net energy involved is this process in dependent on the nature of the reactantand hence rates are different for or different reactants . Let us compare the following two reaction that we CARRIED out in in VOLUMETRIC analysis. 1.Redox reaction between ferrous ammonium sulphate (FAS) and `KMnO_4` 2. Redox reaction between oxalic acid and `KMnO_4` The oxidation of oxalate ion by `KMnO_4`is relatively slow compare to the reaction between `KMnO_4 and Fe^(2+)`In fact heating is required for the reaction between `KMnO_4`and Oxalate ion and is carried out at around `60^@C` The physical state of the reactantalso playsan influence role to influence the rate of reactions. Gas phase reaction are fast as compare to the reaction involving Solid for liquid reactants. For example, reaction of sodium metalwith iodine vapours is faster than the reaction between solidsodium and solid iodine . Let us consider ANOTHER example that we carried out in inorganic qualitative analyses of of lead salts. If we mix the AQUEOUS solution of colorless potassium iodide with the colour sodium of lead nitrate. Precipitation ofyellowlead iodide take place instantaneously, whereas if we mix the soild lead nitrate with solid potassium iodide. Yellow coloration will appear slowly 
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