Final answer:
The molar concentration of a solution is the number of moles per liter, which defines molarity. To compute molarity, divide the moles of solute by liters of solution. Molarity is essential for calculating reactant particles in chemical reactions.
Step-by-step explanation:
The molar concentration of a solution is the number of moles per liter. This measure of concentration is commonly known as molarity, which is expressed as the number of moles of solute that are dissolved in one liter of solution (mol/L). To calculate molarity, you would divide the number of moles of solute by the volume of the solution expressed in liters.
For example, if a solution has 1.5 moles of NaCl dissolved in 0.500 liters of solution, the molarity (M) is calculated as follows:
1.5 moles NaCl / 0.500 liters solution = 3.0 M NaCl
The molarity can be used as a conversion factor to relate moles to grams using the molar mass of the solute. When a concentration is expressed in molarity, it allows chemists to understand how many reactant particles are present in a solution for chemical reactions.