1-Nazorat ishi

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15
O’quvchining javoblari.
O’qituvchining belgilari

Nazorat ishining bali _________
5- Nazorat ishi

Mavzu: “Suvning tarkibi xossalari, tarqalishi, ahamiyati, ishlatilishi”,”Eruvchanlik”, “Eritmalar”mavzularni umumlashtirish.

Nazorat shakli: Masalalar yechish.

1. 3,9g kaliy miqdori suv bilan reaksiyaga kirishgan qancha hajm (n.sh. da) vodorod ajralib chiqadi?

2. Tuzning 20^oC dagi eruvchanlik 25 ga teng bo’lsa, 200 g to’yingan eritmada shu tuzdan necha g bo’ladi?

3. 250 g 10% li natriy gidroksid NaOH eritmasiga 150 g suv quyiladi. Hosil bo’lgan eritmaning konsentratsiyasi ( %) nechaga teng?

4.500 ml 0,2 eritma tayyorlash uchun necha g kaliy karbonat K₂CO₃ kerak bo’ladi?

Masalalarni yechilishi_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Nazorat ishining bali _________