Question

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part 1 of 2
after measuring the mass of a solid in a weighing vessel, what are the proper steps to add the solid to a volumetric flask for making a solution?
○ pour the solid from the weighing vessel directly into the flask.
● pour the solid from the weighing vessel directly into the flask, then rinse the weighing vessel to ensure all residual solid is added to the flask.
○ use a funnel through which the solid is poured into the flask, then rinse the funnel to ensure all residual solid is added to the flask.
○ us ough which the solid is poured into the flask.
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Explanation:

To ensure accurate preparation of a solution, all the measured solid must be transferred to the volumetric flask. Pouring the solid directly first, then rinsing the weighing vessel and adding the rinse (which contains residual solid) ensures no mass is lost. Using a funnel is unnecessary here and introduces extra surfaces that can trap solid, leading to inaccuracies.

Answer:

Pour the solid from the weighing vessel directly into the flask, then rinse the weighing vessel to ensure all residual solid is added to the flask.