Kafedra: Ximiya Ózbetinshe júmisi

4) 0,16 litr 2,5M li HCl eritpesiniń molyalligin tawiń (p=1,175).
Sheshiliw:
Bizlerge bul jerde eritpe kolemin, tigizligi ham molyarin berip qoyipti :
V-0,16l 1) Uliwma eritpe massasin tawip alamiz:
Cm-2,5 m=pV formulasinan paydalanamiz 1,175*0,16=0,188kg=188gr
p-1,175 2) Erigen zat molin tawip alamiz :
n=CmV n=2,5*0,16= 0,4 mol erigen zat
3)Eritiwshi massasin tawip alamiz:
0,4*36,5HCl =14,6 erigen zat massasi , uliwma eritpe massasinan erigen zat massasin alamiz natiyjede eritiwshi massasi shigadi: 188gr-14,6=173,4gr H₂O

4. 
   Endi eritpe molyalligin tawamiz 1000gr-----x=2.3M
   

173,4----0,4 J=2.3M

5) 100gr suwda 25gr NaOH toliq eritildi.Payda bolgan eritpenin molyal koncentraciyasin tabiń?
Sheshiliwi:
Cmolyal=m₁*1000/Mr*m₂
Cmolyal=25gr*1000/100*85=2.94=3mol/kg. J=3mol/kg
6) 24.5%li H2SO4 tin molyal koncentraciyasin tabin?
Sheshiliwi:
Cmolyal=C%*1000/M*(100-C%)
Cmolyall=24.5*1000/98*75.5=3.31 mol/kg. J=3,31mol/kg
7) 5.85M p=1.19g/ml bolgan sulfat kislotanin C molyalin tabiń?
C%=Cm*Mr/p*10 C%=5.85*98/1.19*10=48.17%
Cmolyal=C%*1000/M*(100-C%)=48.17*1000/98(100-48.17)=9.48molyal. J=9,48
8) Belgisiz zattin 20%li eritpesin Cmolyal=6.25 bolsa x zattin` Mr aniqlan?
Sheshiliwi:
Cmolyal=C%*1000/Mr*(100-C%)
Mr=C%*1000/Cmolyal*(100-C%)
Mr=20*1000=6.25*80=40gr NaOH. J=40
9) 20˚C da 4 molyalli Ag₂CrO₄ eritpesinin eriwshenlik koefficientin aniqlan?
Mr(Ag2CrO4)=332 332*4=1328
Eriwshenlik koeficienti 100gr suwda erigeni menen tawilladi!
Demek: 1000------1328
100-------x x=132.8 J=132,8
10)372 gr AgNO₃ eritpesinde 101,136•10²³ kislorod atomi bar. Eritpe molyalligin tawiń.
Sheshiliwi:
Bizge 372gr AgNO₃ ham H₂O quramindagi kislorodlardin sanin beri qoyipti.
101,136*10²³ O₂ atomi avogadro saninda berilgen sonin ushin avogadro turaqlisina bólip O₂ atomin N_A da tawip alamiz: 101,136*10²³ /6,02*10²³= 16,8 N_A
Endi matematikaliq sistema duzemiz:
x AgNO₃ y H₂O
170x+18y=372 Massalari 170x+18y=372 170x+18y=372
3x+y=16,8 Kislorod sani 3x+y=16,8 /18 54x+18y=302,4
116x=69,6 3*0,6+y=16,8
X=0,6 Y=15
Bul jerde y=15 eritiwshi H₂0 moli 18*15=270gr H₂0
X=0,6 erigen zat moli
Endi eritpe molyalligin tawamiz, bizge eritiwshi ham erigen zat mugdarlari belgili:
1000gr-----x=2.22222
270gr----0,6 J=2.22222