AI2(SO4)3 –вычислите массовую долю каждого элемента: [4]
Mr (AI2(SO4)3)
W(AI2)
W(S3)
W(O4)3
Mr (AI2(SO4)3)
W(AI2)
W(S3)
W(O4)3
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Відповідь:
Mr (Al2(SO4) 3) = 2Ar(Al)+ 3Ar(S)+ 3×4Ar(O) = 2×27 + 3×32 + 3×4×16 =342 w (Al2) = 2×Ar(Al)×100% : Mr(Al2(SO4)3) = 2×27×100% : 342 = 16%. w(S3) = 3×Ar(S)×100% : Mr(Al2(SO4)3) = 3×32×100% : 342 =27%. w((O4)3) = 4×3×Ar(O)×100% : Mr(Al2(SO4)3)= 4×3×16×100% : 342 =56%
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