Question

21. (25 points) 8-hydroxyquinoline (Q) can complex and precipitate many metals. A mixture of the aluminum and magnesium complexes weighed 1.0843 g (MW=459.43; 312.61). When ignited, the mixture decomposed and left a residue of Al2O, and MgO weighing 0.1344g. What is the wt% of the Al-complex in the mixture?

Answer 1

HS ५uPDoJe ) &-ydrory fuinoline HQ Let's sayafter Jniion,in residue Wasos ge-lo.1344- Cpmpler t At-At .o843-0 AI3 Inite fprinciple ut atomic Conservatonot A1 = 2xA,03 X LOZS 459.43 c-98 IKmioPriipte of atomte QeAservadion T0843-x 312.61 1344- 40 Fo स" O-1344 7.0343-C 40 3T2.61 cO.2577 X1oo OS77Xt0e 2-3.77/ t.0843