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Class 11ChemistryChapter 01: SolutionsHardLevel 7

A 1 M sodium chloride solution has density 1.05 g mL−1. What is the approximate mass percent of sodium chloride?

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Answer and explanation

Correct answer: 5.57%

Take 1 L solution. A 1 M solution contains 1 mol NaCl, whose mass is approximately 58.5 g. The mass of 1 L solution is 1.05 × 1000 = 1050 g. Therefore mass percent = (58.5/1050) × 100 = 5.571%, approximately 5.57%. Hence B is correct; density is needed to obtain the total solution mass.

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solutionsNaClmass percentageChapter 01: Solutionschapter 01 solutionsChemistryClass 11 MCQ

Frequently asked questions

What is the correct answer to this question?

5.57%

Why is this the correct answer?

Take 1 L solution. A 1 M solution contains 1 mol NaCl, whose mass is approximately 58.5 g. The mass of 1 L solution is 1.05 × 1000 = 1050 g. Therefore mass percent = (58.5/1050) × 100 = 5.571%, approximately 5.57%. Hence B is correct; density is needed to obtain the total solution mass.

Which subject and chapter does this question cover?

This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.

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