Can't Judge A Powder B
Posted: September 5th, 2022, 6:53 pm
That's up to the event supervisor. Each team will be provided with the same quantity of the powder, and you can reasonably assume an adequate quantity to conduct multiple tests, but it would make sense to plan on being economical with the powder you are given.
Read rule 2d and 2e. You are guaranteed to get NaOH, HCl, and distilled water (room temp!) in a wash bottle. You may get almost anything else the ES decides to give you, which might include a hot plate, or hot water, or might not.
I don't think they really mean "visible gas", such as nitrogen dioxide or chlorine gas (neither of which you will see unless you - hopefully - take organic chemistry later on). I think they are simply referring to smoke or "steam", such as what you would see when adding HCl to various compounds. Make sure you document all of these reaction observations.Peiyinglovesscience wrote: ↑October 30th, 2022, 6:42 pm Hello, what does “visible gas” mean?, it is stated in the “adding powder to liquid section”? Also for measurements, will points still be awarded if the measurement written down is close to exact, but not exactly exact?
Yes, be as "economical" as possible! When running this event, we often see students who have not practiced the hands-on parts chemistry events using the materials as if they are baking a cake! I always make a point of letting teams know that powders and liquids will NOT be replenished, but we still get a few who think this is baking class and use too much - especially powder.knightmoves wrote: ↑November 7th, 2022, 6:23 pmThat's up to the event supervisor. Each team will be provided with the same quantity of the powder, and you can reasonably assume an adequate quantity to conduct multiple tests, but it would make sense to plan on being economical with the powder you are given.
Read rule 2d and 2e. You are guaranteed to get NaOH, HCl, and distilled water (room temp!) in a wash bottle. You may get almost anything else the ES decides to give you, which might include a hot plate, or hot water, or might not.