1.

If 200ml of 0.2M HgCl_(2) solution is added to 800ml of 0.5M Kl (100% dissociated) solution. Assuming that the following complex formation taken place to 100% extent.

Answer»

Solution :`{:(HgCl_(2),+,4KI,rarr,K[HgI_(4)],+,2KCl.),(40,,400,,0,,0),(0,,400-160,,40,,80),(,,(240)/(1000),,(40)/(1000),,(80)/(1000)):}`
`PI=(i_(1)C_(1)+i_(2)C_(2)+i_(3)C_(3))RT`.
`=(0.24xx2+3xx0.04+0.08xx2)0.082xx300.=18.69` atm.
Other METHOD :
`{:(HgCl_(2),+,4KI,hArr,K[HgI_(4)],+,2KCl.),(40,,400,,0,,0),(0,,400-160,,40,,80),(,,(240)/(1000),,(40)/(1000),,(80)/(1000)):}`
`pi=(i_(1)C_(1)+C_(2)+i_(3)C_(3))RT`.
`=(0.24xx2+xx0.04+0.08xx2)0.082xx300.=18.69` atm.


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