Mustaqillik yillarida mamlakatimizda hukumatimiz tomonidan ta’lim sohasiga eng muhim vazifa sifatida e’tibor qaratib kelinayotgani sir emas. Bu sohada qator islohotlar qabul qilindi

Nazorat ishining bali _________


III variant
Probirkalarga 3-4 tomchidan kaisiy va bariy tuzlari eritmalaridan tomizib, ular ustiga 3-4 tomchidan natriy karbonat eritmasidan qo'shing. Har bir probirkada hosil bo'lgan cho'kmalar ustiga suyiltirilgan xlorid kislota eritmasidan qo'shing va ohista chayqating. Ularni erish tezligiga ahamiyat bering. Ikkala probirkada sodir bo'ladigan hodisaning reaksiya tenglamasini yozing.
Xulosa____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________