Question

Molar solution means 1 mole of solute present in:
a.) 1000g of solvent
b.) 1 liter of solvent
c.) 1 liter of solution
d.) 1000g of solution.

Answer 1

Hint: To proceed in answering the question, we must recall the basic definition of molarity and we must also keep in mind the correlation of volume and density of a solution.

Complete step by step answer:
Molar concentration can be used to convert between the mass or moles of solute and the volume of the solution.
Molarity is the number of moles of solute per liter of solution, which can be calculated using the following equation given below.

\[Molarity = \dfrac{{Moles\,of\,solute}}{{Litres\,of\,solution}}\]
Hence, the correct answer is Option (C) 1 liter of solution.

Molarity, molality, and normality are all units of concentration. Molarity is defined as the number of moles of solute per liter of solution. Molality is defined as the number of moles of solute per kilogram of solvent and Normality is defined as the number of equivalents per liter of solution. We should use Molality instead of Molarity in experiments involving significant temperature changes. This is because as the volume of a solution increases with temperature, heating causes molarity to decrease; however, since molality is based on mass rather than volume, molality remains unchanged.

Note: Molar concentration can be used to convert between the mass or moles of solute and the volume of the solution.
Molarity is a measurement of the moles in the total volume of the solution, whereas Molality is a measurement of the moles in relationship to the mass of the solvent. Hence, the two should never be confused.