Navoiy shahar 16-sonli ayrim fanlar chuqur o’rganiladigan ixtisoslashgan maktabi 8-“ ”­­­­­ sinf o’quvchisi

Mavzu: Elementlarning oksidlanish darajasi. Oksidlanish-qaytarilish reaksiyalari. Oksidlanish va qaytarilish reaksiyalari tenglamalarini tuzish.
Nazorat shakli:Yozma ish.
I-variant.
1.H₂SO₄, AlPO₄, NaCl ushbu moddalardagi barcha elementlarni oksidlanish darajalarini yozing.
2. Quyidagi reaksiya tenglamasini electron –balans usulida tenglashtiring.
Cu+HNO_3(suyl)=Cu(NO₃)₂+NO+H₂ O
3.Mn⁺²oksidlanish darajasidan Mn⁺⁵ oksidlanish darajasiga o’tganda (Mn⁺²→Mn⁺⁵) electron beradimi? Yoki oladimi?Qanday xususiyatni namoyon qiladi?
4.Oksidlanish darajasi nima?
Kompitentlikni aniqlash uchun materiallar:
5. Nafas olish jarayonimiz oksidlanish qaytarilish reaksiyasining qaysi turiga kiradi? Reaksiya tenglamasi asosida tushuntiring.
II-variant.
1.Quyidagi reaksiya tenglamasini electron –balans usulida tenglashtiring.
Cu+H₂SO_4(kons)=Cu(SO₄)₂+SO₂+ H₂ O
2.H₃PO₄,CuSO₄,CaCO₃ ushbu moddalardagi barcha elementlarni oksidlanish darajalarini yozing.
3.P⁺⁵oksidlanish darajasidan P⁺³ oksidlanish darajasiga o’tganda(P⁺⁵→P⁺³) electron beradimi? Yoki oladimi? Qanday xususiyatni namoyon qiladi?
4.3,2gr Cu suyltirilgan nitrat kislota bilan reaksiyaga kirishganda necha (n.sh.da)litr gaz ajraladi?
Kompetentlikni aniqlash uchun materiallar:
5.O’simliklar bargida kechadigan fotosintez reaksiyasi oksidlanish –qaytarilish reaksiyasini qaysi turiga kiradi? Reaksiya tenglamasi asosida tushuntiring.
Yechish:
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Sana___________________________