Kimyo bakalavr) 2021-2022 o’quv yili I semester uchun II kurs (III semestr) namangan – 2021

3. Ishqoriy metallarning karbonatlari va ammoniy karbonat Zn²⁺ ioni bilan kislotalarda eriydigan, o’zgaruvchan tarkibli oq cho’kma hosil qiladi.

4. Kaliy geksasianoferrat (II) K₄[Fe(CN)₆ Zn²⁺ ioni bilan ishqorlarda eriydigan oq rangli cho’kma - rux va kaliy geksasianoferrat (II) qo’shaloq tuzini hosil qiladi:

3Zn + 2K + 2[Fe(CN)₆] = K₂Zn₃[Fe(CN)₆]₂

SHu reaktsiya tufayli Zn²⁺ ioni Al ionidan farq qiladi, chunki Al ioni K₄[Fe(CN)₆] bilan cho’kma hosil qilmaydi.

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