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Q.

The heat of neutralization between weak acid (HCN) and strong base (NaOH) is (-56.1) kJ/mol. The neutralization between strong acid (HCI) and strong base (NaOH) is (-57.3) k.J/mol. If the weak acid (HCN) is 80% ionized in the above solution then calculate the heat of ionization (in J/mol) for 100% ionization of HCN in the above solution.

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answer is 1500.

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Detailed Solution

Total neutralization,

−56.1+57.3=1.2 kJ/mol80%→1.2100%→1.20.8=1.5
 

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