Andijon viloyati andijon tumani umumta`lim maktabining 8 – “ ” sinf o`quvchisi

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4-Nazorat ishi.

Masala yechish.
1. Tarkibida 16 g mis (II)-sulfat bo‘lgan eritmaga 4,8 g temir qipig‘i solindi. Bunda qancha mis ajralib chiqadi?
2. Noma’lum gazning 1,5· 1022 ta molekulasi 0,05 g massaga ega. Bu qaysi gaz?
3. Quyidagi yadro portlashida qaysi element qatnashgan? X-elementni aniqlang
4. Quyidagi o‘zgarishlarni amalga oshirish uchun zarur reaksiya tenglamalarini
yozing:
Fe → FeCl2 → Fe(NO3)2 →Fe(OH)2→FeO→Fe
5. EO3 tarkibli oksid hosil qiluvchi elementning uchuvchan vodorodli birikmasi tarkibida 5,88% vodorod bo’ladi. Elementning davriy sistemadagi o’rnini aniqlang.
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Amaliy ish №1
Mavzu: „Galogenlar” mavzusiga oid tajribaviy masalalar yechish
Darsning maqsadi: Galogenlarni aniqlash, xossalarini bilish.
Kerakli jihozlar va reaktivlar:Pirabirkalar, pipetka, indikator qog’oz, quruq
yoqilg’i, qisqich, mis (II) oksidi, kumush nitrat, natriy iodid, rux
bo’lakchalari, kalsiy oksidi.
Ishning borishi:
Ish quyidagi jadval asosida olib boriladi. Xlorid kislotasining asosiy
xossalariga taaluqli o’tkaziladi. Tajribalar xavfsizlik qoidalariga rioya
qilingan holda olib boriladi.
Kimyoviy birikma Kuzatuv natijasi Reaksiya tenglamasi
1. Xlorid kislotaning indikatorga ta’siri.
A) lakmus qog’ozi B) metiloranj A) Binafsha rangli lakmus qog’ozi qizil ranga kiradi.
B) To’q sariq rangi qizilranga kiradi
2. Xlorid kislotani metallar bilan ta’siri (Zn)
Gaz ajralishi bilan boradi 2HCl+Zn=ZnCl2 + H2
3. Xlorid ionini aniqlash uchun kumush nitrat eritmasidan foydalaniladi
(sifat reaksiyasi) Xlorid kislotaga kumush nitrat qo’shilsa Oq cho’kma tushadi.
HC1 +AgNO3=HNO3+ AgCl
Galogenlaming kumush bilan hosil qilgan birikmalarida cho’kma tushishi
kuzatiladi.
Sizga berilgan quruq tuz bariy xlorid ekanligini tajribalar yordamida isbotlang.
Kerakli reaksiya tenglamalarini yozing.
Xulosa.
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Sana Ball Imzo