Rux, temir va aluminiy aralashmasini xlorlash uchun 0,55 mol xlor sarflandi. Shunday aralashmani to‘la eritish uchun esa 1 mol xlorid kislota sarflandi. Aralashmadagi Fe massasini (g) aniqlang.

Xlorlashda Fe→FeCl₃ (n(Cl₂)=1,5n), HCl bilan Fe→FeCl₂ (n(HCl)=2n). Tenglamalar yechiladi: n(Fe)=0,1 mol ⇒ m=5,6 g.

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