Expert Chemistry Chapter 01: Solutions Class 12 Level 6

20 ग्राम विलेय को 180 ग्राम जल में घोला गया। विलेय का द्रव्यमान प्रतिशत और विलायक का द्रव्यमान प्रतिशत क्रमशः क्या होंगे?

20 g solute is dissolved in 180 g water. What are the mass percentages of solute and solvent respectively?

Explanation opens after your attempt
Correct Answer

A. 10 प्रतिशत और 90 प्रतिशत / 10 percent and 90 percent

Step 1

Concept

Total mass of solution = 20 + 180 = 200 g.

Step 2

Why this answer is correct

Solute percent = 20 ÷ 200 × 100 = 10 percent. Solvent percent = 180 ÷ 200 × 100 = 90 percent.

Step 3

Exam Tip

The two mass percentages must add up to 100. चरण 1: कुल विलयन का द्रव्यमान २० + १८० = २०० ग्राम है। चरण 2: विलेय का प्रतिशत = २० ÷ २०० × १०० = १० प्रतिशत। विलायक का प्रतिशत = १८० ÷ २०० × १०० = ९० प्रतिशत। चरण 3: दोनों द्रव्यमान प्रतिशतों का योग १०० होना चाहिए।

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