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

Sana

Amaliy ish №2Mavzu: “ Ishqoriy metallar” va “Kalsiy” mavzulari bo’yicha tajribaviy masalalar yechish

Kerakli jihozlar va reaktivlar. probirkalar, gaz o’tkazgich nayli tiqin, shtativ,

probirka qizdirgich, natriy xlorid (NaCl), natriy gidroksid (NaOH), natriy karbonat (Na2СО3), natriy nitrat (NaNO3) kaliy xlorid (KC1), kaliy gidroksid (KOH), kaliy karbonat (K2CO3), kalsiy karbonat (СаСОз), kalsiy xlorid (CaCl2), suyultirilgan xlorid kislota (HC1), kalsiy gidroksid (Ca(OH)2), distillangan suv, kumush nitrat 1% li eritmasi (AgNO3).

Ishning borishi:

1. To‘rtta raqamlangan probirkada:

a) natriy xlorid; b) natriy gidroksid; d) natriy karbonat; e) natriy nitrat beri lgan. Qaysi probirkada qanday modda borligini aniqlang.

2. To‘rtta raqamlangan probirkada:

a) kaliy xlorid; b) kaliy karbonat; d) kalsiy karbonat;

e) kalsiy xlorid berilgan. Qaysi probirkada qanday tuz berilganini aniqlang.

3. Sizga berilgan ikkita probirkada rangsiz eritmalarning qaysi biri kaliy gidroksid, qaysi biri kalsiy gidroksid eritmasi ekanligini aniqlang.

4. Quyidagi o‘zgarishlarni amalga oshirish uchun imkon

beradigan reaksiyalar tenglamalarini yozing:

Ca(OH)2 - CaCO3 - Ca(HCO3)2 -CaCO3 - CaCl2

Yuqorida ko‘rsati lgan barcha tajribalarning reaksiya tenglamalarini

molekulyar, to‘liq va qisqa ionli ko‘rinishda yozing.

5. Ohakli suvning tiniq eritmasidan 2—3 ml oling. Eritma loyqalangunga qadar uglerod (IV)-oksid o‘tkazing. Loyqalangan eritmani uchta probirkaga bo‘lib oling: a) 1- probirkaga ohakli suv quying;

b) 2- probirkaga natriy karbonat eritmasidan quying; d) 3- probirkani qizdiring.

Topshiriqlar:

1. Kuzatilgan tajribalarda sodir bo‘lgan kimyoviy jarayonlarni

izohlang, reaksiya tenglamalarini yozing.

2. Bajarilgan ishlar uchun hisobot tuzing

Xulosa._________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Sana

6-Nazorat ishi.

1. 
   Kalsiy va magniny elementlarini electron formulalarini yozing
   

2.Quyidagi o‘zgarishlarni amalga oshirish uchun zarur reaksiya tenglamalarni yozing: Ca CaH2Ca(OH)2CaCO3CaOCaCl2

3. Kalsiy xloridning 10 % li eritmasi tibbiyotda shamollash

bilan bog‘liq turli kasalliklarda qo‘llaniladi. Uning

800 g eritmasini tayyorlash uchun qancha CaCl2 va qancha

distillangan suv kerak?

4.Alyumimiyning amfoter xossalarini namoyon qiluvchi reaksiya tenglamalarini yoznig.

5. Alyuminiyning ishlatilish sohalarini yozib bering

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________