The maximum amount of zn + 2 iron that can be mixed in 16 ml solution of nh42s the molality is equals to 0.26 M with no participation occur KSP equals to 3.54 into 10 ki power minus 22

27. Calculate the amount of Fe+2 ions in 500 ml Mohr’s salt solution if 10ml of this solution is titrated with 7.5ml 0.06N KMnO4 solution. (1ml 1N KMnO4= 0.05584 gm of F+2). Ans: 1.256 gm

he excess partial molar free energy of iron at 1600°C (1873 K) in Fe-Ni solutions atdifferent compositions isgiven below. xNi lÇ9 : 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 cal/mole : 0 -15 -40 -90 -260 -620 -1330 -2030 -2730 deg/mole: 4.56 2.87 2.20 1.84 1.42 1.04 0.72 0.44 0.21 (^Fe> J//mot : ° ~6Z ~16? ~Z7? ~1088 ~2594 ~5566 ~8494 ~11422) Calculate the excess partial molar free energy of nickel in an equi atomic solution.

calculate molarity of the standardized potassium permanganate solution in redox titration of iron 2 into iron 3. molecular weight of hydrated ferrous ammonium sulfate is 392.14 g/mol. also use the ration of iron 2 to permanganate ion from equation: 5Fe + Mn04 + 8H gives 5Fe + Mn + 4H2O. VOLUME OF KMnO4 used in titration is 7.65 ml and mass of hydrated ferrous ammonium sulfate is 0.2911 g.

m When Fe0.930 is heated in presence of oxygen, it converts to Fe2O3. The number of correct statement/s from the following is mathongomathonga mathonga A. The equivalent weight of Fe0.930 is Molecular weight mathongy mathongu mathongs m 0.79 B. The number of moles of Fe2+ and Fe3+ in 1 mole of Fe0.930 is 0.79 and 0.14 respectively. C. Fe0.930 is metal deficient with lattice comprising of cubic closed packed arrangement of O2 ions. 14. mathongo mathong mathongom D. The % composition of Fe2+ and Fe3+ in Fe0.930 is 85% and 15% respectively. mathongom

The liquid solutions of MnO in FeO and of Mn in Fe are virtually ideal at 1600°C (1873 K). Calculate the concentration of manganese in iron in wt% which is in equilibrium with a slag containing 40% MnO and 60% FeO at this temperature. Given: (Fe0)slag + [Mn]^ = (Mn0)$lag + [Fe]^ ; AG° = -29,080 + 3.67 T cal (-121,671 + 15.35 T J). Atomic weights of Fe and Mn are 55.85 and 54.94 respectively.