Adqiqo On 28fevral

Javob: 10"C da tuzning eruvchanlik koeffitsienti 9 gr ga teng.
2-misol. 46 g X % li eritmaga 2,8 g tuz qo’shilganda to’yingan eritma hosil bo’ldi. Shu tuzning eruvchanligi 22 ga teng bo’lsa, X ning qiymatini aniqlang.
Yechish: S=22
Eruvchanlik koeffitsiyentiga ko’ra 100 gr suvda 22 gr tuz eriganda 122 gr to’yingan eritma hosil qilgan. Tarkibida C%= mtuz/mer=22/122=0,1803 *100%=l 8,03% tuz
bor.To’yingan eritmaning o’zgarmas haroratda C % ham o’zgarmas bo’ladi degan qoidadan quyidagi tenglamani tuzamiz:





C%

m (tuz)
m (eritma)

0,1803 =

m (tuz)
46+ 2.8

To’yingan eritmadagi tuzning massasi m(tuz)=8,8 gr ga teng ekan, demak boshlang’ish eritmada m_bosh(tuz)= 8,8-2,8=6gr tuz bo’lgan.
Uning C% = * 100% = 100% = 13,04% ga teng ekan.
m(eritma) 46
Javob: 13,04%
3-misol. Na₂SO₄ to’yingan eritmasiga Na₂SO₄ qo' shib qizdirildi. Bunda 500 g 20 % li eritma olindi. Dastlabki sharoitga keltirilganda 124,6 g Na₂SO₄.10H₂O cho' kmaga tushdi. Dastlabki eritma (%) toping.
Yechish:
Masala shartiga ko’ra umumiy tuzning massasi 500 gr ni 20% ni tashkil qilyabdi, ya’ni





m(Na₂SO₄)=

G%* m ( eritma]
100%

500*20
100%

lOOgr.

Umumiy m(suv)=500-100=400gr. Eritmani qizdirib sovitish natijasida
Na₂SO₄*10H₂O Na₂SO₄+ 10H₂O
322 gr 142 gr 180gr
124.6gr x y
x= 55gr tuz y=69,6 gr suv kristallogidratga aylanib cho’kmaga o’tgan. Natijada eritmada m(suv)=400-69,6=330.4 gr qolgan,
m(tuz)= 100-55=45 gr qolgan.

45
To’yingan eritmaning o’zgarmas haroratda C % ham o’zgarmas bo’ladi.Ya’ni harorat ko’tarilib so’ng boshlang’ich haroratga keltirilgandan keyin eritmaning C% ham o’zearmavdi:
C% = ^m〔^tUZ)、* 100% =* 100% = 12% m (eritma) 45 + 330,4
Javob:Demak boshlang’ich eritmada to’yingan eritmaning 12 %ini tuz tashkil qilar ekan.

Foyfalanilgan adabiyotlar ะ

1. 
   O’zb eki st on Pespublikasi Prezidenti Sh.Mirziyayevning Oliy majlisga murojatnomasi;
   
2. 
   I.R.ASKAROV,K.G’OPIROYN.X.TO’XTÂBOYEV KIMYO-8 darslik.TOSHKENT ‘ YANGIYUL POLIGRAPH SERVİCE” 2019
   

3.1.R.ASKAROVN.X.TO’XTABOYEY K G’OPIROVKIMYO-7METODIKQO’LLANMA IZMIR.2003-yil “Zambak”nashriyoti

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OofiaajıaHHjıraH aaaöneTjıap

1. 
   KoHap>KeBCKHH K). A. AHajiH3 ypoKa. - M.: UeHTp «IleflarorHHecKHH noHCK», 2000. - 336 c.
   
2. 
   HHO3eMueBa c. B. YHeÖHbiH 3KcnepıiMeHT KaK cpe^CTBO (J)opMnpoBaHiM npo(|)eccHOHajibHbix yMeHHH öy^ymero yHHTejıa. - ^HC. KaHfl. nefl. HayK. - BpaHCK, 1997.-206 c.
   
3. 
   ®ypaeBa A., KapHMOB A. “EııojıorıiK KHMĕ” (|)aHHflaH aMajiHH MamryjiOT flapcjıapn^a ne- flarorıiK TexHOJioriMHH Kyjıjıam öyHHHa yıçyB-ycjıyÖHH K；yjijıaHMa-“TomKeHT”- 2010.
   

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