Can't Judge a Powder B

rockernerdzgurl · Post by **rockernerdzgurl** » March 2nd, 2011, 1:36 pm

is it basically just making observations?

Post by **robotman** » March 2nd, 2011, 1:46 pm

The normal use of a graduated cylinder is to measure an amount of liquid and or solid , and since the rules do not have a clause about measuring devices they are not specifically permitted. The only clause that would come close is 2.b.v which reads "containers appropriate for testing conductivity or solubility..." , however since a graduated cylinder is not the best tool nor the right tool to test either solubility or conductivity. I personally wouldn't group it into that section of the rule. Since I do not write the rules the only official way to verify whether or not a graduated cylinder is technically permitted is a clarification on whether to count it as a container to measure solubility or a measuring container. When I run/help with tests for CJAP that ask the volume of a powder i make sure that the container holding the powder has ml markings so that all teams have and equal advantage at that point

rockernerdzgurl wrote:is it basically just making observations?

Effectivaly yes that is what this is about and also the test is whether you can use your observations to support your answers (inferences)

rockernerdzgurl · Post by **rockernerdzgurl** » March 2nd, 2011, 2:58 pm

ok thats what I thought...good

geekychic13 · Post by **geekychic13** » March 4th, 2011, 1:48 pm

go to the website (sionc.org) for info, talk to your partner, talk to your coach, the science teacher at your school, ask other people, look stuff up on google, check out the test exchange and wiki page for this event, and if you're in illinois, ignore this message (no, jk)

rockernerdzgurl wrote: i just got forced into this event,I am in Crime Busters,I don't really know what to do. SOMEONE PLEASE HELP!!

geekychic13 · Post by **geekychic13** » March 4th, 2011, 1:52 pm

i don't think it really matters how you use the gradulated cylinder as a container to measure solubility or a measuring container, because either way you're allowed to bring it.

robotman09 wrote:The normal use of a graduated cylinder is to measure an amount of liquid and or solid , and since the rules do not have a clause about measuring devices they are not specifically permitted. The only clause that would come close is 2.b.v which reads "containers appropriate for testing conductivity or solubility..." , however since a graduated cylinder is not the best tool nor the right tool to test either solubility or conductivity. I personally wouldn't group it into that section of the rule. Since I do not write the rules the only official way to verify whether or not a graduated cylinder is technically permitted is a clarification on whether to count it as a container to measure solubility or a measuring container. When I run/help with tests for CJAP that ask the volume of a powder i make sure that the container holding the powder has ml markings so that all teams have and equal advantage at that point

rockernerdzgurl wrote:is it basically just making observations?
Effectivaly yes that is what this is about and also the test is whether you can use your observations to support your answers (inferences)

Half-Blood-Princess · Post by **Half-Blood-Princess** » March 4th, 2011, 7:30 pm

geekychic13 wrote:when a powder is dissolved in H2O, that means its soluble
DanielleS wrote:Hi, this is going to seem like kind of a stupid question, but I'm a little confused. When a powder is dissolved in water, and there is a color change or the clearness of the water changes (transparent to translucent or opaque) is the powder soluble in water? For some reason, I am having a lot of trouble with solubility and Google isn't helping me too much. Thanks !

If the powder changed the color of the H2O then it did not dissolve.

purplepeopleeater · Post by **purplepeopleeater** » March 6th, 2011, 1:46 pm

or did not dissolve completely.
therefore is somewhat/partially/weakly/slightly (what ever you want) soluble.

geekychic13 · Post by **geekychic13** » March 7th, 2011, 2:49 pm

Half-Blood-Princess wrote:
geekychic13 wrote:when a powder is dissolved in H2O, that means its soluble
DanielleS wrote:Hi, this is going to seem like kind of a stupid question, but I'm a little confused. When a powder is dissolved in water, and there is a color change or the clearness of the water changes (transparent to translucent or opaque) is the powder soluble in water? For some reason, I am having a lot of trouble with solubility and Google isn't helping me too much. Thanks !
If the powder changed the color of the H2O then it did not dissolve.

how do you know that? I'd really like you to prove it. That would be awesome, so I could do better at STATE.

Cheesy Pie · Post by **Cheesy Pie** » March 8th, 2011, 7:45 pm

geekychic13 wrote:how do you know that? I'd really like you to prove it. That would be awesome, so I could do better at STATE.

Just curious, but what school do you go to? And nice job getting into state. I'm on JV, but I'm really smart and got first in this.

geekychic13 · Post by **geekychic13** » March 9th, 2011, 2:08 pm

I'm on JV also

Cheesy Pie wrote:
geekychic13 wrote:how do you know that? I'd really like you to prove it. That would be awesome, so I could do better at STATE.
Just curious, but what school do you go to? And nice job getting into state. I'm on JV, but I'm really smart and got first in this.

Scioly.org

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