Crime Busters B

Post by **bernard** » Thu Jun 16, 2016 10:00 pm

Crime Busters Wiki
Science Crime Busters Test Exchange 2017
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Past Question Marathons: 2015, 2016

drcubbin · Post by **drcubbin** » Sat Nov 26, 2016 4:23 pm

Are we using Logol's for the KI Solution?

Post by **Unome** » Sat Nov 26, 2016 6:19 pm

drcubbin wrote:Are we using Logol's for the KI Solution?

To the best of my knowledge, the KI solution mentioned in the rules is Lugol's solution.

drcubbin · Post by **drcubbin** » Sun Nov 27, 2016 8:06 am

Much appreciated!

biojameskim2002 · Post by **biojameskim2002** » Mon Jan 02, 2017 9:42 pm

Hi all,

I was just wondering how zinc reacts in HCl and iodine. After research online, i found there is a lot of fizz when mixed with HCl, but when I tried that with my own personal tools, there seems to be little to no reaction. What may be the problem in this situation?

SenseiSushi · Post by **SenseiSushi** » Mon Jan 02, 2017 11:14 pm

biojameskim2002 wrote:Hi all,

I was just wondering how zinc reacts in HCl and iodine. After research online, i found there is a lot of fizz when mixed with HCl, but when I tried that with my own personal tools, there seems to be little to no reaction. What may be the problem in this situation?

Zinc should react with HCl, but oftentimes this reaction is delayed or does not show up clearly as the HCl provided in competitions is diluted. I don't believe iodine is typically used to identify metals.

Color is usually my go-to when identifying zinc as it has a shiny silver color.

Neharaval · Post by **Neharaval** » Thu Jan 05, 2017 3:59 pm

I was wondering if we need to bring all powders and fibers or metals
which has to be tested or they will provide it.

Panda Weasley · Post by **Panda Weasley** » Thu Jan 05, 2017 4:51 pm

Neharaval wrote:I was wondering if we need to bring all powders and fibers or metals which has to be tested or they will provide it.

The event supervisor will provide all of the unknown materials to be provided. The only things you need to bring are listed in the rules.

abriddle · Post by **abriddle** » Sat Jan 14, 2017 8:27 am

Hello- This is the first year I will be participating and was wondering where I can buy a practice kit that would contain everything needed? Thanks

egbertghost · Post by **egbertghost** » Sat Jan 14, 2017 9:17 am

abriddle wrote:Hello- This is the first year I will be participating and was wondering where I can buy a practice kit that would contain everything needed? Thanks

You can buy a kit with pretty much everything here https://www.wardsci.com/store/catalog/p ... 470222-058
The only downside is that it is pretty expensive oTL

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