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

Sana Ball Imzo
7-nazorat ishi

Yozma ish.

1.Oltingugurt(IV)-oksidning asosli oksidlar, ishqorlar va suv bilan reaksiya

tenglamasini yozing.

2.FeS ning massa ulushi 88% bo’lgan 1kg temir sulfiddan qancha (n.sh) hajm vodorod sulfid olish mumkin?

3. NO + O2 ↔NO2 + Q reaksiyada temperatura ortishi,bosimni kamayishi

muvozanatni qaysi tomonga siljitadi?

4. Quyidagi o’zgarishlardagi A va B moddalarni aniqlang va reaksiya tenglamalarini yozing. A →SO2 →SO3→B

Kompitentlikni aniqlash uchun materiallar:

5. Gips tibbiyotda turli bog’lamalar qo’yish uchun ishlatilishi ma’lum. Tabiiy gipsni tabiatda qanday uchrasi, suvsizlantirilishidan qanday mahsulotlar olinishini, va ishlatilish sohalarini i yozing.

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Sana Ball Imzo
Amaliyish№3

Mavzu: Ammiak olish va u bilan tajribalar o’tkazish.

Darsning maqsadi: Ammiak olish va u bilan tajribalar o’tkazishni o’rganish.

Kerakli jihozlar va reaktivlar: Ammoniy xlorid5kalsiy gidroksid, xlorid

kislota, fenolftalein, pirobirkalar, pipetka, shtativ, gaz olish asbobi, qizdirgich.

Ishning borishi: (Xavfsizlik qoidalariga rioya qiling)

Probirkaga ammoniy xlorid hamda kalsiy gidroksid kukunlarini aralashtirib

solinadi va uni og’zini gaz o’tkazgich nayli probirka bilan mahkamlanadi.

Nayning ikkinchi uchini teskari qo’yilgan bo’sh probirkaga Kiritiladi. Aralshmali probirkani biroz isitiladi. O’tkir hid paydo bo’lgandan kegin qizdirish to’xtatiladi va hosil bo’lgan gazni suvli probirkaga solinadi. Ajmmiakli suv hosil bo’ladi. Ammiakli suvga 2-3 tomchi fenolftalein tomizilganda eritma rangi o’zgaradi, lakmus qog’oz tekkizilganda esa binafsha ranga kiradi. Xlorid kislota solganda esa rang yo’qoladi.

Mavzuni mustahkamlash uchun ammiakli suv, xlorid kislota va nitrat kislota

bilan reksiya tenglamalari yozing.

Ammiak olish asbobi

Xulosa.

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