Question

When calculating the molarity of an NaCl solution made by dissolving 36.29 g of NaCl in 2.30 L of solution, what will be the final molarity?

a) Explain the steps involved in calculating molarity.
b) Discuss the concept of molarity and its significance in solution chemistry.
c) Solve similar problems involving the determination of molarity.

Answer 1

To find the molarity of an NaCl solution, convert the mass of NaCl to moles, then divide by the volume of the solution. Molarity, a central concept in solution chemistry, indicates the concentration of solute per liter of solution.

Step-by-step explanation:

To calculate the molarity of an NaCl solution, you first need to convert the mass of NaCl to moles using its molar mass (58.44 g/mol).

Convert the mass of NaCl into moles: Number of moles = 36.29 g ÷ 58.44 g/mol = 0.621 moles NaCl.

Divide the number of moles by the volume of the solution in liters to obtain the molarity: Molarity = 0.621 mol ÷ 2.30 L = 0.270 M.

Molarity is a measure of the concentration of a solute in a solution and is defined as the number of moles of solute per liter of solution. It is significant in solution chemistry because it allows chemists to prepare solutions with specific concentrations and to react specific amounts of reactants in chemical reactions.