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  • Need explanation for: Which one of the following substances has the highest proton affinity?

Which one of the following substances has the highest proton affinity?

  • Option 1)

    H_{2}O

  • Option 2)

    H_{2}S

  • Option 3)

    NH_{3}

  • Option 4)

    PH_{3}

 

Answers (1)

best_answer

As we learnt in

Laboratory preparation of ammonia -

By heating a mixture of NH4Cl and slaked lime Ca\left ( OH \right )_{2}

- wherein

2NH_{4}Cl+Ca\left ( OH \right )_{2}\overset{\Delta }{\rightarrow}CaCl_{2}+2NH_{3}+2H_{2}O

 

 

The stability of the conjugate acid will give us the compound with highest proton affinity.

NH4+ is the most stable conjugate acid of all.


Option 1)

H_{2}O

This option is incorrect.

Option 2)

H_{2}S

This option is incorrect.

Option 3)

NH_{3}

This option is correct.

Option 4)

PH_{3}

This option is incorrect.

Posted by

Aadil

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