Order the reactivity of the compounds evaluated in the \"Effect of Solvent\" exp

Question

Order the reactivity of the compounds evaluated in the "Effect of Solvent"             

      experiment? Were these results consistent with the expected results? Discuss

      why your results were or were not in agreement with the expected results.

Effect of solvent

Trial one

Trial two

Silver nitrate (absolute)

Ppt formed at 0.04 seconds

Ppt formed at 0.05 seconds

Silver nitrate (5% ethanol)

Ppt formed at 0.039 seconds

Ppt formed at 0.037 seconds

Effect of solvent

Trial one

Trial two

Silver nitrate (absolute)

Ppt formed at 0.04 seconds

Ppt formed at 0.05 seconds

Silver nitrate (5% ethanol)

Ppt formed at 0.039 seconds

Ppt formed at 0.037 seconds

Explanation / Answer

silver nitrate forms precipitate with halides

AgNO3 + X - --------------------------> AgX (ppt) + NO3-

here AgNO3 is not perfectly ionic compound. so there is covalent character between Ag+ and NO3-

inorder to form precipitate with halogen Ag -NO3 bond should be broken easily.

in pure (absolute) AgNO3 is taken there is not solvent interactions present in the AgNO3 there will be time taken to break AgNO3 bond so precipitation formation time is also high.

in case of ethanol AgNO3 there will be solvent AgNO3 interactions are present. so the bond Ag-NO3 broken easily and give precipitate easily that mean lesser time taken to precipitate

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