Having just spoken to my teacher about the creation of a standard solution, and she suggested one way of doing it, however a previous chemistry teacher had told us a different way of doing it. My question is, (of the below methods) which is the "correct" way of doing it, and what are the pros/cons of doing one over the other? If you're interested in the full procedure of making this/any other standard solution (with the names of compounds, it is page 24 here).
The solid was weighed accurately in a weighing bottle, and then transferred to the volumetric flask, and then the bottle is re-weighed to calculate the amount of solid transferred to the flask.
Rather than re-weighing the solid in the weighing bottle, the weighing bottle is rinsed with DI water, and then poured into the volumetric flask. (this is repeated a few times).
If I'm not including enough detail in the above methods please let me know and I'll try to expand. For reference the 2 methods are Part 1, step 3 of the above link.