Chemistry, asked by sushmanegi36, 10 months ago

एक पदार्थ के 5g को 50 g जल में घोलने पर हिमांक में
1.2 K की कमी हो जाती है। विलेय का मोलर द्रव्यमान ज्ञात कीजिए। जल का
ग्राम-अणुक अवनमन स्थिरांक 1.85 Kkg mol-1 है।​

Answers

Answered by anujachare
0

I don't know about this question

Answered by knjroopa
2

Explanation:

Given 5 g of a substance dissolved in 50 g of water in freezing point 1.2 K decreases. Find the molar mass of the solute. Of water The gram-specific decay constant is 1.85 kg mol-1.

  • Given Δ Tf = 1.2 degree Celsius
  • W solvent = 50 g
  • W solute = 5 gm
  • Kf = 1.85 degree Celsius gm / mol
  • We know that M2 = Kf x W solute x 1000 / Δ Tf x W solvent
  •                            = 1.85 x 5 x 1000 / 1.2 x 50  
  •                          = 154.166 g / mol

Therefore molecular weight of the substance is 154.2 g/mol

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