Say he put, oh, a quarter cup of salt in. If he put put a half a cup of salt in, the needle would spin a ways farther?

more salt = more ions so yes, but only until the solution reaches saturation. To add more beyond that point won't change the needle because the salt doesn't dissolve (unless the solution is heated).

I keep noticing French on the bottles that Brit uses. Is he from Canada?

You called it! "In" Canada at least. "From" Canada unclear but very very likely. We might note that Canada isn't the only place where this phenomena is observed :)

Will this work in sea water or (the ocean)?

Hello Hidalgotj, Yes, it will work in sea water. The real question is will you be able to detect it with this crude compass measurement device. This sounds like a good science experiment. If you had a good voltmeter you could see how the voltage changes as a function of the salt concentration. On a related note you may be interested in the string galvanometer: http://www.hektoeninternational.org/index.php?option=com_content&view=article&id=16 Regards, APD

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Electrolyte (salt test)

Name: Electrolyte (salt test)
Uploaded: 2013-04-20T15:47:35Z
Description: What happens to the deflection when we add salt to an electrolyte? Why?

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What happens to the deflection when we add salt to an electrolyte? Why? Created by Brit Cruise.

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That One Doge
Posted 11 years ago. Direct link to That One Doge's post “Say he put, oh, a quarter...”
Say he put, oh, a quarter cup of salt in. If he put put a half a cup of salt in, the needle would spin a ways farther?
Button navigates to signup pageComment on That One Doge's post “Say he put, oh, a quarter...”
(11 votes)
Answer
- Tony Salls
  Posted 11 years ago. Direct link to Tony Salls's post “more salt = more ions so ...”
  more salt = more ions so yes, but only until the solution reaches saturation. To add more beyond that point won't change the needle because the salt doesn't dissolve (unless the solution is heated).
  Comment on Tony Salls's post “more salt = more ions so ...”
  (13 votes)
Wudaifu
Posted 11 years ago. Direct link to Wudaifu's post “I keep noticing French on...”
I keep noticing French on the bottles that Brit uses. Is he from Canada?
Button navigates to signup pageComment on Wudaifu's post “I keep noticing French on...”
(2 votes)
Answer
- Exponentially Radical
  Posted 11 years ago. Direct link to Exponentially Radical's post “You called it! "In" Canad...”
  You called it! "In" Canada at least. "From" Canada unclear but very very likely. We might note that Canada isn't the only place where this phenomena is observed :)
  Button navigates to signup page
  (4 votes)
Saif Ur Rahman
Posted 11 years ago. Direct link to Saif Ur Rahman's post “Please give examples of e...”
Please give examples of electrolytic cell and non-electrolytic cell.....
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(2 votes)
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Hidalgotj2000
Posted 8 years ago. Direct link to Hidalgotj2000's post “Will this work in sea wat...”
Will this work in sea water or (the ocean)?
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(1 vote)
Answer
- APDahlen
  Posted 8 years ago. Direct link to APDahlen's post “Hello Hidalgotj, Yes, it...”
  Hello Hidalgotj,
  
  Yes, it will work in sea water. The real question is will you be able to detect it with this crude compass measurement device.
  
  This sounds like a good science experiment. If you had a good voltmeter you could see how the voltage changes as a function of the salt concentration.
  
  On a related note you may be interested in the string galvanometer:
  
  http://www.hektoeninternational.org/index.php?option=com_content&view=article&id=16
  
  Regards,
  
  APD
  Button navigates to signup page
  (2 votes)
Aniket
Posted 10 years ago. Direct link to Aniket's post “At 0:47 what does the sal...”
At
0:47
what does the salt contain that makes the compass arrow move? Is it some magnetic properties?
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(1 vote)
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- ethanwillard
  Posted 8 years ago. Direct link to ethanwillard's post “The salt contains positiv...”
  The salt contains positively and negatively charged ions. The two kinds create a sort of path for electricity through the water, giving it more current. More current is more magnetism.
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  (1 vote)
JulSchluck
Posted 10 years ago. Direct link to JulSchluck's post “Would a salt that contain...”
Would a salt that contains a bivalent kation like magnesium or calcium be an even better electrical conductor than the monovalent sodium?
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(1 vote)
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Citrus
Posted 7 years ago. Direct link to Citrus's post “Will it still work if the...”
Will it still work if there wasn't any water in the cup, only salt?
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(1 vote)
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Justin Case
Posted 10 years ago. Direct link to Justin Case's post “If salt water is an elect...”
If salt water is an electric conductor then why doesn't it short-circuit the whole thing and lead the current straight through the water?
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(1 vote)
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Joshua Harris
Posted 9 years ago. Direct link to Joshua Harris's post “because he shows you hand...”
because he shows you hands on than then not showing just talking
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(1 vote)
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jc99612510
Posted 9 years ago. Direct link to jc99612510's post “what does the salt do so ...”
what does the salt do so the compass could move ?
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(1 vote)
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Video transcript

su xörək duzu elektrod 1 :duzsuz , elektrod 2: duzlu

Physics library

Course: Physics library > Unit 18

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Video transcript