Mukarram Qodirova Mavzu bayoni

Sana : 15.05.2020

Mavzu : Masalalar yechish

O‘qituvchi: Lobar Boboqulova

Mavzu bayoni:

• 
  Masala: 20,16 litr (n.sh.) atsetilendan 18,72 gramm benzol olingan bo’lsa, reaksiya unumini (%) hisoblang.
  

20,16 l 18,72g

3C₂H₂ —→ C₆H₆

Berilgan:

V = 20,16 l 67,2 — 78 η = (18,72 * 100) / 23,4 = 80%

m = 18,72g 20,16 — x

η = ? x = (20,16 * 78) / 67,2 = 23,4g

Javob:_80%___Masala'>Javob: 80%

• 
  Masala: 200g 40% li natriy ishorining eritmasini neytrallash uchun qanday massadagi (g) sirka kislotasi kerak bo’ladi?
  

80g xg

NaOH + CH₃COOH → CH₃COONa + H₂O

m = 200g m_NaOH = (200 * 40) / 100 = 80g

C_% = 40% 80g — xg

m = ? 40g/mol — 60g/mol x = (80 * 60) / 40 = 120g

Javob: 120g

• 
  Masala: 40% natriy ishqorining 200 gramm eritmasi metilatsetat bilan ta’sirlahuvidan necha gramm spirt hoil bo’ladi?
  

80g

CH₃COOCH₃ + NaOH → CH₃COONa + CH₃OH

m = 200g m_NaOH = (200 * 40) / 100 = 80g

C_% = 40% 80g — xg

m = ? 40g/mol — 32g/mol x = (80 * 32) / 40 = 64g