Hello, I am trying to reply to people that posted back, but don't know how to do that, so Im just writing a reply to my topic in hopes everyone who posted will see it.
@Borek: I looked up "weighing glass" and found "glass weighing boats" and "glass weighing funnels." I dug through the glassware drawers in our community lab and I actually found one of them. And used it! The sodium borohydride did not stick very much, and I was able to tap the glass funnel against the neck of the reaction flask, which helped dislodge most of any stuck pieces. Then I sprayed just a tiny bit of water on it to get remainder. So easy and so satisfying to have a good solution! Thank you!
@Babcock_Hall - I was thinking I was going to do this if I didn't find another way...I was nervous about dissolving it in water before it got inside the reaction flask. Also didn't want to get residue stuck in pipet or have to wash pipet and add more water to the reaction flask. But it probably would have served just fine. Thank you for the idea.
@Rolnor - Thanks for your kind note about importance of practical skills. I definitely want to know as many as I can!