Samarqand viloyati paxtachi tumani umumta`lim maktabining 9 – “ ” sinf o`quvchisi

Sana

7-Nazorat ishi.Nazorat shakli:Masala yechish.

1.KMnO₄+KNO₂+H ₂SO₄= reaksiyani davom ettiring va elektron-balans usulida tenglashtiring.

2.Tarkibida 10%qo’shimcha modda bo’lgan 30gr kaliy permanganat parchalanganda necha gr marganesli birikma hosil bo’ladi.

3.Temir atomining oxirgi d elektronlarini kvant sonlarda ifodalang.

Kompetentlikni aniqlash uchun materiallar:

4.Hayotda ko’p kuzatadigan temirning zanglashini kimyoviy tenglamalar orqali tushuntiring?

5.Temir haqida qanday ma’lumotlarga ega bo’ldingiz?

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Sana

3-Amaliy ish. "Metallar"mavzusi bo'yicha tajribaviy masalalar yechish.

Kerakli jihozlar va reaktivlar. natriy gidroksid; kalsiy karbonat;

alyuminiy sulfat; temir (Ill)-xlorid. probirka, misning suvda eruvchan tuzi

Ishning borishi:

1. To‘rtta raqamlangan probirkada quyidagi moddalar berilgan

a) natriy gidroksid; b) kalsiy karbonat; c) alyuminiy sulfat; d) temir (Ill)-xlorid.

Qaysi probirkada qanday modda borl igini kimyoviy tajribalar yordamida aniqlang.

2. Sizga berilgan misning suvda eruvchan tuzidan foydalanib, qanday usullar bilan mis (Il)-oksid hosil qila olasiz?

3. Laboratoriyadagi mavjud reaktiv va jihozlardan foydalanib, to‘rt xil usul bilan rux xlorid tuzini hosil qiling?

Topshiriqlar:

1. Yuqorida bajarilgan har bir tajribada sodir bo‘lgan kimyoviy

reaksiyalarning tenglamalarini yozing.

2. Sodir bo‘lgan o‘zgarishlarni izohlang.

3. Bajarilgan ish yuzasidan hisobot yozing

Xulosa .___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________