0.5 mole of solute is dissolved in water to make 1 litre of solution. What is the molarity?
Answer and explanation
Correct answer: 0.5 mole per litre
Molarity is the concentration expressed as moles of solute per litre of the final solution: M = n/V. Here, n = 0.5 mol and V = 1 L, so M = 0.5/1 = 0.5 mol L⁻¹. Therefore, option A is correct. Option B would represent 1 mole in 1 litre, while options C and D incorrectly make the concentration larger than the given amount allows.
Frequently asked questions
What is the correct answer to this question?
0.5 mole per litre
Why is this the correct answer?
Molarity is the concentration expressed as moles of solute per litre of the final solution: M = n/V. Here, n = 0.5 mol and V = 1 L, so M = 0.5/1 = 0.5 mol L⁻¹. Therefore, option A is correct. Option B would represent 1 mole in 1 litre, while options C and D incorrectly make the concentration larger than the given amount allows.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
