Molar Concentration Calculator:
Enter the values of number of moles of solute, n(mol) and volume of the solution, V(L) to determine the value of Molarity, M(mol/L).
Molar Concentration Formula:
Molar concentration, also known as molarity (M), is a measure of the concentration of a solute in a solution. It is the number of moles of solute per litre of solution. Molarity is commonly used in chemistry to express concentrations in reactions, solutions, and laboratory preparations.
A higher molarity indicates a greater amount of solute dissolved in the solution, while a lower molarity represents a more diluted solution. The unit of molarity is moles per liter (mol/L), and it is represented by the symbol M.
Molar concentration plays a crucial role in stoichiometric calculations, chemical reactions, and titrations, as it helps determine the reactant-product relationships. To prepare a solution of a specific molarity, a precise amount of solute is dissolved in a given volume of solvent.
This ensures accurate measurements in chemical reactions, maintaining consistency in laboratory experiments. Molarity depends on temperature because the volume of a liquid expands or contracts with temperature changes, affecting concentration calculations.
The formula for molarity considers the number of moles of solute and the total volume of the solution in litres. If the mass of the solute is known, the number of moles can be determined using the molecular weight of the substance.
Molarity, M(mol/L) in mole per litre equals the number of moles of solute, n(mol) in moles divided by the volume of the solution, V(L) in litres.
Molarity, M(mol/L) = n(mol) / V(L)
M(mol/L) = molarity in moles per litre, mol/L.
n(mol) = number of moles in moles, mol.
V(L) = volume of the solution in litres, L.
Molar Concentration Calculation:
- A solution contains 0.5 moles of sodium chloride (NaCl) in 2 litres of solution. Calculate the molarity of the solution.
Given: n(mol) = 0.5mol, V(L) = 2L.
Molarity, M(mol/L) = n(mol) / V(L)
M(mol/L) = 0.5 / 2
M(mol/L) = 0.25mol/L.
- A solution has a molarity of 1.5 mol/L and contains 0.75 moles of solute. Find the volume of the solution.
Given: n(mol) = 0.75mol, M(mol/L) = 1.5mol/L.
Molarity, M(mol/L) = n(mol) / V(L)
V(L) = n(mol) / M(mol/L)
V(L) = 0.75 / 1.5
V(L) = 0.5L.