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Re: Crime Busters B

Posted: January 2nd, 2014, 7:10 pm
by percyjackson2014
cupcakegirl wrote:
Joseph Morales12 wrote:What is HCI
Hydrochloric acid. In Crime Busters, we use 1 molar HCl.
HCL is... Hydrochloric acid :)

Re: Crime Busters B

Posted: January 3rd, 2014, 4:08 pm
by percyjackson2014
I need some help, i can't tell the difference between H2O and Hydrogen Peroxide!!!! I have tested it w/ shaking it and seeing if it bubbles with I2, it does not. I have tried testing everything!!!!!!!! I have even tried seeing if the ph will change if I put a drop of I2 and HCL in to it! None of my lab work shows any difference in the two!!!!! HELP! :?:

Re: Crime Busters B

Posted: January 5th, 2014, 6:57 pm
by bob doyson
percyjackson2014 wrote:I need some help, i can't tell the difference between H2O and Hydrogen Peroxide!!!! I have tested it w/ shaking it and seeing if it bubbles with I2, it does not. I have tried testing everything!!!!!!!! I have even tried seeing if the ph will change if I put a drop of I2 and HCL in to it! None of my lab work shows any difference in the two!!!!! HELP! :?:

Re: Crime Busters B

Posted: January 6th, 2014, 7:19 am
by dholdgreve
bob doyson wrote:
percyjackson2014 wrote:I need some help, i can't tell the difference between H2O and Hydrogen Peroxide!!!! I have tested it w/ shaking it and seeing if it bubbles with I2, it does not. I have tried testing everything!!!!!!!! I have even tried seeing if the ph will change if I put a drop of I2 and HCL in to it! None of my lab work shows any difference in the two!!!!! HELP! :?:
One of the ways I'm an able tell the difference between Hydrogen Peroxide and water, is to take a dropper, and drop a drop of the liquid on your skin, if it bubbles, it's Hydrogen Peroxide.
Rule 4d does not allow the touching or tasting of the chemicals... As an Event Proctor, I include all liquids as chemicals, as it is just a very bad lab practice to put unknown materials on your skin... If you get use to that now, what happens when you get to college and are given 10M Nitric acid as an unknown? There are much better ways to determine if it is H2O or H2O2 than to shake or become a human guinea pig... Continue to experiment using the other "unknown" chemicals you are given.

Re: Crime Busters B

Posted: January 6th, 2014, 9:11 am
by emescferrall
percyjackson2014 wrote:I need some help, i can't tell the difference between H2O and Hydrogen Peroxide!!!! I have tested it w/ shaking it and seeing if it bubbles with I2, it does not. I have tried testing everything!!!!!!!! I have even tried seeing if the ph will change if I put a drop of I2 and HCL in to it! None of my lab work shows any difference in the two!!!!! HELP! :?:

Do not put it on your skin. I have found that a good way to tell the difference between the two. Put a drop of Iodine in both liquids, and WAIT!!! When I first tried this, it was at least a minute and a half before I got a reaction. Hydrogen Peroxide will have VERY small bubbles!! You will have to look closely, because the bubbles are minuscule. However, they are there!! Trust me :-) Btw, I love your username!!

Re: Crime Busters B

Posted: January 6th, 2014, 3:24 pm
by bob doyson
emescferrall wrote:
percyjackson2014 wrote:I need some help, i can't tell the difference between H2O and Hydrogen Peroxide!!!! I have tested it w/ shaking it and seeing if it bubbles with I2, it does not. I have tried testing everything!!!!!!!! I have even tried seeing if the ph will change if I put a drop of I2 and HCL in to it! None of my lab work shows any difference in the two!!!!! HELP! :?:

Do not put it on your skin. I have found that a good way to tell the difference between the two. Put a drop of Iodine in both liquids, and WAIT!!! When I first tried this, it was at least a minute and a half before I got a reaction. Hydrogen Peroxide will have VERY small bubbles!! You will have to look closely, because the bubbles are minuscule. However, they are there!! Trust me :-) Btw, I love your username!!
Oh that's right, I missed that part of the rules, thanks for the clearification

Re: Crime Busters B

Posted: January 19th, 2014, 8:58 am
by [Isis2014]
Hey. This is my first year doing Crime Busters...Any tips?!? or things to remember?!?!

Re: Crime Busters B

Posted: January 19th, 2014, 5:20 pm
by vennowsah
[Isis2014] wrote:Hey. This is my first year doing Crime Busters...Any tips?!? or things to remember?!?!
The Crime Busters Wiki should have everything you need to know, or at least the basics. Also, have a list the densities of some of the most common liquids such as water, alcohol, iodine, etc. as well as the densities of all the substances you need to test out. This really comes in handy when identifying them. And be sure to manage your time properly, as I always run out of time to write the essay. XD Try to save at least 15 minutes near the end to work on your essay/analysis.
Hope that helped. (:

Re: Crime Busters B

Posted: January 19th, 2014, 5:58 pm
by [Isis2014]
vennowsah wrote:
[Isis2014] wrote:Hey. This is my first year doing Crime Busters...Any tips?!? or things to remember?!?!
The Crime Busters Wiki should have everything you need to know, or at least the basics. Also, have a list the densities of some of the most common liquids such as water, alcohol, iodine, etc. as well as the densities of all the substances you need to test out. This really comes in handy when identifying them. And be sure to manage your time properly, as I always run out of time to write the essay. XD Try to save at least 15 minutes near the end to work on your essay/analysis.
Hope that helped. (:
thnx :)

Re: Crime Busters B

Posted: January 19th, 2014, 6:14 pm
by emescferrall
[Isis2014] wrote:
vennowsah wrote:
[Isis2014] wrote:Hey. This is my first year doing Crime Busters...Any tips?!? or things to remember?!?!
The Crime Busters Wiki should have everything you need to know, or at least the basics. Also, have a list the densities of some of the most common liquids such as water, alcohol, iodine, etc. as well as the densities of all the substances you need to test out. This really comes in handy when identifying them. And be sure to manage your time properly, as I always run out of time to write the essay. XD Try to save at least 15 minutes near the end to work on your essay/analysis.
Hope that helped. (:
thnx :)
Also, KNOW YOUR POWDERS, LIQUIDS, AND METALS!!!!!