Kimyo fanidan

Sana______
8-nazorat ishi.
Mavzu:Anorganik birikmalarning eng muhim sinflariga oid bilimlarni
umumlashtirish.
Nazorat shakli: Tajribaviy masalalar yechish.
I-variant
Tajriba.50gr 10% li NaCl eritmasini tayyorlash.
Bunda eritmani tayyorlash uchun kerak bo’ladigan tuz va suvning massasini hisoblab toping. So’ngra texnik tarozida tuzni o’lchab olib, stakanga soling, ustiga kerakli suvni menzurkada o’chab olib quying, so’ngra shisha tayoqcha yordamida yaxshilab aralashtiring. Hosil qilgan eritmangizni o’qituvchi bergan idishga quyib, eritmaning nomini va konsentratsiyasini yozib qo’ying.
Kompetentlikni aniqlash uchun materiallar:
O’zingiz kundalik turmushda qanday eritmalarni tayorlagansiz?
II-variant
Tajriba. Neytrallanish reaksiyasi.
Chinni kosachaga 3ml kaliy ishqori eritmasidan quying.unga lakmus qog’ozini botiring va eritmaning rangiga e’tibor bering. Eritmadan lakmus qog’ozini olib, ustiga tomchilatib sulfat kislota eritmasidan quying hamda shisha tayoqcha yordamida doimo aralashtirib turing. Hosil bo’lgan aralashmani spirt lampasi yordamida qizdiring va suv bug’lanib bo’lgach, tuzni ko’zdan kechiring. Reaksiya tenglamasini va tajriba xulosalarini yozing.
Kompetentlikni aniqlash uchun materiallar:
Yana qanday neytrallanish reaksiyalarini bilasiz?

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Baho_____