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

Sr²⁺ Stronsiy kationi xususiy reksiyalari.

Gipsli suv, ya’ni CaSO₄ ning tuyingan eritmasi stronsiy ionlari mineral kislotalarda erimaydigan oq cho’kma hosil qiladi Bu usul bilan stronsiyni aniqlashga Ba^2 ionlari halaqit beradi. Cho’kma hosil bo’lishi uchun eritmani biroz isitib .so’ngra sovutish kerak.

Тajribaning bajarilishi: Probirkaga 4 tomchi stronsiy eritmasidan olib unga 5-6 tomchi gipsli suv qo’shing va suv hammomida isitiladi. Eritma sovitilganda 10 –15 daqiqadan so’ng oq kristall cho’kma hosil bo’ladi .

Ammoniy oksalati (NH₄)₂S₂O₄ stronsiy kationi bilan oq cho’kma hosil qiladi:

Sr^2  (NH₄)₂S₂O₄  SaS₂O₄   2NH₄^

Alangani bo’yash. Rangsiz platina yoki nixrom simga yuktirilgan stronsiyning uchuvchan tuzlari tutilsa . alanga qirmizi qizil rangga bo’yaladi.

Тajribaning bajarilishi: 1.2.3. tajribaga qaralsin.

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