A standard solution is a solution with a known concentration of a solute, used as a reference in various chemical analyses. It is essential for accurate measurements in titrations and other quantitative experiments, ensuring that results can be compared and validated. In laboratory settings, standard solutions are often prepared from pure substances and are crucial for calibrating instruments and validating methods. They help chemists determine the concentration of unknown solutions by providing a reliable benchmark, making them fundamental in fields like analytical chemistry and quality control.