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।
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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
Reference link will be
https://brainly.in/question/2801396
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