Molarity (M) is a measure of the concentration of a solution, defined as the number of moles of solute per liter of solution. It is expressed as:
M= Moles of solute ÷ Liters of solution
Key Points:
- Molarity (M) is measured in moles per liter (mol/L).
- Solute: The substance being dissolved (e.g., salt, sugar).
- Solvent: The liquid in which the solute is dissolved (e.g., water).
- Solution: The resulting homogeneous mixture.
Example Calculation:
If you dissolve 0.5 moles of NaCl in 1 liter of water, the molarity is:
M = 0.5 moles ÷ 1 litre = 0.5(M)
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