Can't Judge a Powder B

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Goet
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Re: Can't Judge a Powder B

Post by Goet »

Any help with finding a "typical" voltmeter for this event? I'm not sure what kind will work and don't want to dump a ton of budget money for a more complex one when the team could have gotten away with a cheapie.

Which to buy?
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Re: Can't Judge a Powder B

Post by 2win »

uhh, i don't think you're allowed to bring one.. the rules say a battery conductivity tester.

and for ionic/covelent compounds:

ionic compounds are: brittle, hard, and have a high melting point

covelent compounds are: usually liquids or gases at room temperature.
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Re: Can't Judge a Powder B

Post by Goet »

I have battery operated multimeters. Will these do? Am I looking at just the simple 9 volt connected to an LED (hi/med/low) or do they require that I have some digital readout, i.e. numbers?
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Re: Can't Judge a Powder B

Post by robotman »

ok for all of you wondering about conductivity testers there are a few options ( i dont believe they will allow voltmeters)
you can buy one from a science supply site for amazon

or you can make your own with just a few supplies to make your own you can follow the instructions on this site
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Re: Can't Judge a Powder B

Post by Sunshine »

Does anyoen know if there a place where you can find a list of indicators? Not pH indicators, but like lugol's, bromethyl blue, etc. that test for proteins and carbohydrates and stuff? I've looked all over google and a few textbooks, and the only things I came up with were pH indicators.
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Re: Can't Judge a Powder B

Post by CJAP Crazy MMM »

I dont really know. But i well ask around if i do find out youll be the first to know! :D
Sunshine wrote:Does anyoen know if there a place where you can find a list of indicators? Not pH indicators, but like lugol's, bromethyl blue, etc. that test for proteins and carbohydrates and stuff? I've looked all over google and a few textbooks, and the only things I came up with were pH indicators.
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Re: Can't Judge a Powder B

Post by Mellogirl »

This is my first time in the event. Are we allowed to bring our materials in with us or do we have to impound them?

- Thanks!
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Re: Can't Judge a Powder B

Post by robotman »

Mellogirl wrote:This is my first time in the event. Are we allowed to bring our materials in with us or do we have to impound them?

- Thanks!
Read the rules :|
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Re: Can't Judge a Powder B

Post by Mellogirl »

robotman09 wrote:
Mellogirl wrote:This is my first time in the event. Are we allowed to bring our materials in with us or do we have to impound them?

- Thanks!
Read the rules :|
sorry, i forgot to delete this awhile ago. :oops:
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Re: Can't Judge a Powder B

Post by 4science »

I have a question about testing EC of the solution. Do you only test it with the powder dissolved in water?
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