Scioly.org

First of all, red cabbage juice really is just that... it's not a trade name for any commercially produced indicator... Accompany Mom to the grocery next time she goes and ask her to buy a head of red (purple actually) cabbage... when you get home, cut it up, turn on the hood over the stove, and boil the heck out of it. Now fry up some ground beef and serve the cabbage with it...

Take the remaining purple juice and refrigerate (yes, it will spoil if left out). Take some baking soda and disolve in water, then add a couple of ml to 20 ml of the juice... now take some vitamin C tabs, crush, and disolve in water. Repeat the same process with that liquid and compare the resultant solutions.

http://www.stevespanglerscience.com/experiment/00000048

NaOH has always been a rather mysterious reagent to test with, ofter providing much less dramatic reactions than those of HCl... Here's a really great site to view short clips of various NaOH reactions that may help you identify what you are looking for:

http://genchem.chem.wisc.edu/lab/cca/ma ... /page1.htm

dholdgreve wrote:Red Cabbage juice is another natural reagent that seems like it ALWAYS stumps at least half of the teams!

red cabbage juice? that wasn't used in the delaware states Can't Judge a Powder event.

Thanks for the links!

dholdgreve wrote:NaOH has always been a rather mysterious reagent to test with, ofter providing much less dramatic reactions than those of HCl... Here's a really great site to view short clips of various NaOH reactions that may help you identify what you are looking for:

http://genchem.chem.wisc.edu/lab/cca/ma ... /page1.htm

omg my school is going to state all the way we have such a great team and i couldn't ask for a better team . i just want to say if my team is reading this i cant wait to go to state with yal, and thank you for makeing this such a wonderful first year on science olympaid,and first year of are school being open you make ms.poteet and i proud.!

nice, congrats! ... but this would be better posted somewhere else.

What's the best way to tackle the
"Give the best observation you've made you have not already marked"
question? What's a good thing to include?

sciolympian wrote:is a 15th ranking out of 50 teams...
pick one: (excellent) (very good) (good) (okay) (bad) (very bad) (shocking)

how do i delete this post?

if you trying to delet this post you go to edit and then just delete it

I got 8th in this event, and medals only went up to 7th place!
For this event, know everything and anything there is to know about how to use lab equipment and making observations.

sciolyandmathcounts wrote:What's the best way to tackle the
"Give the best observation you've made you have not already marked"
question? What's a good thing to include?

Please help?