Question: (1) A solution containing 7mmol Fe+2 is titrated by a standard solution of ceric sulfate Ce(SO4)2, the final volume is 350 ml. What weight

(1) A solution containing 7mmol Fe+2 is titrated by a standard solution of ceric sulfate Ce(SO4)2, the final volume is 350 ml. What weight of ferrous ions remains un oxidized at the equilibrium point. (2) The e.m.f of the cell Pt H(1 atm), HA(0.15M) || KCI (2M), HgCl Hg is +0.72 volt. Compute the concentration of H+ ion in the HA solution and from this the dissociation constant for HA? for the Ecalomal =-0.28v. (B) A solution mixture of propanoic acid (2.5M) and HCN (1.5M), calculate the CN/CHCHCOO ratio. Given that K CHCH2C00= 1.35 *105 and Ka HCN=6.2*10-10.

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