Which step is NOT part of preparing a quantitative (QT) solution with readily soluble dry chemicals?

The process of preparing a quantitative (QT) solution involves several critical steps to ensure accuracy and precision. When preparing such solutions, it is essential to follow a series of actions that involve careful handling of materials.

The correct answer pertains to the procedure where adding the solute to a beaker is not a fundamental step in creating a QT solution. Instead, the appropriate method typically involves adding the solute directly to a volumetric flask. This approach helps maintain the desired volume and concentration of the solution, as volumetric flasks are designed for precise dilutions.

In contrast, rinsing the weigh container with solvent ensures that all of the solute is transferred into the volumetric flask, preventing any loss of material. Stoppering and inverting the volumetric flask aids in mixing the solution thoroughly, promoting complete dissolution of the solute. Additionally, swirling the flask while incorporating the solvent helps to expedite the dissolving process, which is critical for achieving uniformity in the solution.

By following these correct steps, you ensure the preparation of a solution that accurately reflects the desired concentration and volume, which is vital for quantitative analysis. Thus, adding the solute directly to a beaker does not align with the methodical approach necessary for creating a QT solution,