What characterizes a standard solution?

A standard solution is specifically defined by having an accurately known concentration of a solute. This precise knowledge of concentration is crucial for various applications, particularly in analytical chemistry, where it is needed for titrations and calibration of other solutions. The reliable concentration allows chemists to make accurate quantitative measurements and comparisons.

In contrast, factors such as temperature stability, corrosiveness, or conductivity are not inherent characteristics of a standard solution. While a standard solution may be stable at a certain temperature, it is its accurate concentration that fundamentally defines its classification as a standard solution. The requirements for standard solutions focus on their use in precise analytical contexts, making concentration the key characteristic.