What should be the total volume to prepare a 2 M solution using 0.4 mole solute?
Answer and explanation
Correct answer: 0.2 litre
Molarity is M = n/V. Rearranging gives V = n/M, where V is the final solution volume in litres. Substituting n = 0.4 mol and M = 2 mol L⁻¹ gives V = 0.4/2 = 0.2 L. Thus option A is correct. This refers to the total final volume of solution, not simply the initial solvent volume; the solution should be made up to 0.2 L after dissolving the solute.
Frequently asked questions
What is the correct answer to this question?
0.2 litre
Why is this the correct answer?
Molarity is M = n/V. Rearranging gives V = n/M, where V is the final solution volume in litres. Substituting n = 0.4 mol and M = 2 mol L⁻¹ gives V = 0.4/2 = 0.2 L. Thus option A is correct. This refers to the total final volume of solution, not simply the initial solvent volume; the solution should be made up to 0.2 L after dissolving the solute.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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