done a lab,mix zinc w/acid, got hydrogen then i put the hydrogen in tubes, tested em to see if theyre pure (if get a bark when u put a lighter to the tube, its not pure). need help answering these questions::__
Have a burning splint about 15 cm long ready to introduce into the bottle of hydrogen just after it's lifted, mouth down and held vertically, from the glass plate. Observe carefully as the burning splint is slowly inserted into the bottle of hydrogen. Watch the mouth of the bottle carefully, as the splint is slowly withdrawn from the bottle. Insert the splint a second time, & again withdraw it slowly. Observe the inside walls of the bottle
9.Will the splint bum in the atmosphere of hydrogen? Explain.
10.Where is combustion taking place? Explain.
11.What did you observe on the walls of the bottle? Explain
12.Why does a test tube of hydrogen mixed w/air Xplode/Bark while a test tube of pure hydrogen burns quietly?
13.)Balance: Zinc + Sulfuric Acid =
Hydrogen + Oxygen =
2007-01-17 12:21:00 · 3 answers · asked by truckin_90 2 in Science & Mathematics ➔ Chemistry
Unlike others, I don't mind doing a lot of your lab work, home work for you. Please study the answers, learn, and please get from me a love of this empowering science.
9. The splint should not burn, because H2 does not support combustion.
10. But if some O2 from air gets into the tube...
11. Did you observe droplets or a fog of water?
12. A critical mixture of O2 and H2 will explode (bark).
13. Zn + H2SO4 ===> ZnSO4 + H2(g)
14. 2H2 + O2 ===> 2H2O
2007-01-17 12:46:15 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
it is fairly not a lab. growing to be up, my family members bred labs, and that's one hundred% not purebred. feels like she has slightly lab in her, yet not complete blooded. The tail is purely too bushy, labs have shorter hair than that... and any purebred lab won't have a 2d coloring. they are the two organic chocolate, organic black, or organic yellow/white. The ears are actually not lab the two... seems to have some variety of terrier in her.... probably some variety of spaniel with the long hair. uncertain on the mixture, yet not a lab. I accept as true with a prior poster... she's been far greater than bred (till she has abandoned new doggies someplace) and desires to be spoiled and pampered for something of her life... she's definitley a cutie!!! have you ever chosen a popularity? And dont forget to her her pictures!! have relaxing along with her!
2016-10-31 09:51:39 · answer #2 · answered by Anonymous · 0⤊ 0⤋
With all due respect, how are WE supposed to account for YOUR observations? How are we supposed to know what YOU saw? Sure there may be a set of "correct" observations, but what if they do not apply here? (Say you goofed, or your instructor prepared something wrongly)....
THINK before you just blatantly spread your homework out for us to do for you, my good friend.
2007-01-17 12:25:35 · answer #3 · answered by ? 4 · 0⤊ 0⤋