Amaliy ish №1 Mavzu: „Galogenlar” mavzusiga oid tajribaviy masalalar yechish Darsning maqsadi

Amaliy ish №2
Mavzu: „Oltingugurt” mavzusi bo’yicha tajribaviy masalalar yechish


Darsning maqsadi: Oltingugurt birikmalarining xossalarini bilish, sulfat kislota ionini aniqlay bilish.
Kerakli jihozlar va reaktivlar. Pirabirkalar, pipetkalar, kalsiy xloridning 0,5 N,natriy sulfat 0,5 N, kaliy sulfat 0,5 N, natriy karbonat 0,5 N, qo’rg’oshin (II) nitrat 0,5 N, bariy xloridning 0,5 N, konsentrlangan va 1:5 nisbatdan suyultirilgan sulfat kislota, distillangan suv, rux bo’lakchalari.
Ishning borishi: (Xavsizlik qoidalariga rioya qiling)
1. Probirkaga 1 ml natriy sulfat, 2- probirkaga 1 ml kaliy sulfat eritmasidan pipetka yordamida quyiladi. Har ikkala probirkaga bariy xlorid eritmasidan oz-ozdan tomiziladi va oq cho’kma hosil bo’lganligi kuzatiladi.
(Reaksiya tenglamalarini yozing)
2.1 - probirkaga 2 ml suyultirilgan sulfat kislotadan, 2- probirkaga 2 ml konsentrlangan sulfat kislotadan ehtiyotkorlik bilan quyiladi. Har ikkalasini
ustiga rux bo’lagidan bir donadan solinadi. Qaysi probirkada jarayon qanday
ketganligi hamda reaksiya tenglamalari yoziladi.
3. 3 ta probirkada kalsiy, xlorid, natriy sulfit va kaliy sulfat tuzlari berilgan. Qaysi probirkada qanday tuz borligini aniqlash kerak. Probirkaning 1- siga natriy karbonat eritmasidan 2 ml qo’shilganda oq cho’kma tushganligi kuzatiladi va bu cho’kmaga suv qo’shganda eimaydi.2- probirkaga qo’rg’oshin nitrat eritmasidan qo’shilganda qora cho’kma hosil bo’ladi. Demak, 2- probirkada sulfid ioni borligi mavjud.
3- probirkaga bariy xlorid eritmasidan 2 ml qo’shilganda oq ch o’kma tushadi.
1 va 3- probirkalarda bir xil hodisa bo’lganligi sabali ularni alangaga ta’siri
orqali aniqlaymiz. Har ikkala cho’kmaga nixrom sim botirib olinib, alangaga
tutiladi. 1- probirkadagi eritmadan olingani qizil qo’ng’ir rang berib yonadi bu
esa eritmada kalsiy borligini bildiradi. Demak 1- probirkada kalsiy xlorid 2-
probirkada natriy sulfit, 3-probirkada esa kaliy sulfat tuzlari eritmasi berilgan.
O’tkazilgan tajribalami reaksiya tenglamalarini yozing:
Xulosa.
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Sana _______________20__yil