Expert Chemistry Chapter 01: Solutions Class 12 Level 4

किसी द्विघटकीय विलयन में विलायक का मोल अंश शून्य दशमलव सात पाँच है और विलेय के मोल तीन हैं। विलायक के मोल कितने होंगे?

In a binary solution, the mole fraction of solvent is 0.75 and moles of solute are 3. How many moles of solvent are present?

Explanation opens after your attempt
Correct Answer

A. 9 मोल / 9 mol

Step 1

Concept

Let moles of solvent be y, so y/(y + 3) = 0.75.

Step 2

Why this answer is correct

y = 0.75y + 2.25, so 0.25y = 2.25 and y = 9.

Step 3

Exam Tip

Place the moles of the component whose mole fraction is given in the numerator. चरण 1: मान लें विलायक के मोल y हैं, तब y/(y + 3) = 0.75। चरण 2: y = 0.75y + 2.25, इसलिए 0.25y = 2.25 और y = 9। चरण 3: जिसका मोल अंश दिया हो, उसके मोल को ऊपर रखकर हल करें।

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