Flinn Scientific Inc. is the leader in science and laboratory chemical safety. Flinn publishes the world-renowned Flinn Catalog/Reference Manual. Flinn Scientific develops and offers a full line of chemistry, biology, physics, life science, earth science, physical science, and safety products for high schools and middle schools.
The demonstrations performed in the videos on our channel are intended for and should only be performed by certified science instructors in a safe classroom/laboratory setting.
fantastic. The only way to improve the experiment is to smash the two balls together *without* the foil, proving that the sparks are only generated when Al is present. ie; A true thermite reaction. This effect is of commercial significance in ship cargo holds where Mg anodes have fallen and impacted rusted surfaces, with the kinetic energy providing the activation energy for the spark and subsequent detonation of the volatile ballast contents.
If OH- ion is accumulated at the blue side, then O2 gas is supposed to be produced there. If H+ ion is accumulated at the yellow side, then H2 gas is supposed to be produced there. Remember: these ions are not the only onces that are found at the black and red lead; its just that power of preferential discharge had taken effect.
Thanks so much. This really helped with finding the right starting points for this reaction as well as providing a simple technique for varying the concentration. But could you please tell us what molarity of HCl you are using.
This guy is so dangerous! Flame Arrestor: Always use a flame arrestor when working with hydrogen gas and open flames. This device prevents a flame from traveling back into the hydrogen source, which could cause a catastrophic explosion.
I do have a question. I always slightly turn on my oxygen before I light my torch. If I light it with just acetylene I get all this carbon soot and it will really make a mess in a house or a restaurant and it lingers everywhere and won’t go away. So what makes that happen? I think it’s because of incomplete combustion. It is getting secondary air from the atmosphere but probably isn’t hot enough to burn off all the fuel so you’re left with this soot that just hangs around. Am I right?
Thank you so much. This is an awesome explanation. I’ve never understood chemistry. It’s something my mind cannot understand. I am a Heat & air contractor and I’ve used an oxy/acetylene torch for over 20 years and somehow I stumbled across your video. I like filling up milk jugs with my torch and throwing them in a fire! I will get a good flame mixture on my torch and shut off the acetylene bottle to extinguish it without changing my mixture and then I turn the bottle back on and fill the milk jug displacing the air. And when I think it’s filled up I cap it and throw it on the fire! Book! My friend showed me how to remotely use an electronic match. And then I started filling up big trash bags and putting an extension cord with steel wool to short the connections and I connect it to 36 volts on my golf cart. Boom! I never understood how it works but I enjoyed your video.
Hello Scientist Finn, I have sodium alginate in pieces like the fiber one cereal, would it work still if i dissolve it in say distilled water and then attempt to put it in Calcium Chloride. Thank you for your expertise, Trinidad
Problem is the fact that Flinn doesn't let you buy anything on this table unless you have a school account. Totally stupid. There is no harm in shipping lab grade sodium borate and guar gum to a home address. Too bad for those who are home schooling their children about polymers in an adult setting.
I just look into him, Professor Emeritus Irwin Talesnick (the old guy), and he apparently died on 21 November 2020. 😥 He started off as a High School science teacher in the 1960s and then went into teaching science teachers how to teach science at Queens University in Canada. He was obviously very successful, as shown in the video!
They are not stronger than steel, even under the more optimistic claims we are talking about 150k lbf but more conservative estimates are 3372 lbf. Even in a press it will dent aluminum but barely harm the steel.
I would just use salt, using a carbonate can create emulsions if you intend to grab something not so polar along with the alcohol. This trick works very well for separation of heavier MW alcohols from side products ❤
On the chalkboard is written: Mass of 54.9mL. I think it should read VOLUME of 54.9 mL. Right? In the video the instructor says VOLUME of 54.9 mL. Right?
