A solution contains 0.4 mole solute and has molarity 0.8 M. What is the volume of the solution?
Answer and explanation
Correct answer: 0.5 L
Molarity is defined as the amount of solute in moles per litre of solution: M = n/V. Rearranging the equation gives V = n/M. Substituting the data, V = 0.4 mol ÷ 0.8 mol L−1 = 0.5 L. Thus option A is correct. The value 0.32 L results from multiplying n and M, while 2 L incorrectly reverses the required ratio.
Frequently asked questions
What is the correct answer to this question?
0.5 L
Why is this the correct answer?
Molarity is defined as the amount of solute in moles per litre of solution: M = n/V. Rearranging the equation gives V = n/M. Substituting the data, V = 0.4 mol ÷ 0.8 mol L−1 = 0.5 L. Thus option A is correct. The value 0.32 L results from multiplying n and M, while 2 L incorrectly reverses the required ratio.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Some Basic Concepts of Chemistry. Topic: Mole concept and molar mass.
