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Is there a list of characteristics and how to test for them available?

ToniJackson wrote:Is there a list of characteristics and how to test for them available?

There's a pretty good list to start with on the [wiki]Can't Judge A Powder[/wiki], but beyond that, just try to think of EVERY SINGLE POSSIBLE observation you can make with every reaction.

What is the cleavage of a powder and how do your test for it, what would you write for observations? Thanks

Should i memorize the periodic table

I don't think you'll need to for this event; it's very likely you won't need to know all the elements.

hmssciencenerd wrote:Should i memorize the periodic table

Your time would be better spent studying a glossary of chemical terms, types of chemical bonds, What elements react with NaOH to form insoluble salts (and why), What chemicals react with HCl and what that reaction might be? How you would know if Ammonium ions were present in the sample? Nail all that and you'll be a super star!

What is the best way to keep track of the observations you come up with? Thanks

Katkatkat wrote:Can someone please tell me the strength of the sodiumhydroxide solution? I found a local store, but I need to know the percentage.

It is most likely .1 molar or 1 molar, there really isn't much of a percentage, I guess you could say that .1 molar is 10% but its better to say that one liter of the solution contains .1 moles of NaOH

How do you measure the conductivity of powder in 1M HCl and 1M NaOH because conductivity of HCl and NaOH itself is very high. I just bought a cheap conductivity meter Hydroponics Aquarium EC Conductivity Tester Meter µS/cm from Amazon for coaching kids. Does it work? Or any other suggestion for measuring conductivity in HCl and NaOH. Thx

sandhya_326 wrote:How do you measure the conductivity of powder in 1M HCl and 1M NaOH because conductivity of HCl and NaOH itself is very high. I just bought a cheap conductivity meter Hydroponics Aquarium EC Conductivity Tester Meter µS/cm from Amazon for coaching kids. Does it work? Or any other suggestion for measuring conductivity in HCl and NaOH. Thx

I believe the ionization of a chemical relates primarily to the free ions released in distilled water, with the quantitative portion being the delta between the distilled water and the aqueous solution... To receive full credit for a questions dealing with electrolytes, conductivity of the substance, ionic bonding, etc, observations need to be included that include conductivity of the distilled water itself (control observation), approximate amount of substance added to approximate amount of distilled water (it doesn't matter how much, the important thing is that it is quantified), and the conductivity of the resultant aqueous solution.