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davecutting wrote:

terence.tan wrote:

daydreamer0023 wrote:
This has already been addressed in the FAQs: https://www.soinc.org/do-balloons-have-be-commercial

I'm just wondering, what is your take on ballon. because I think that a plastic bag should work

That's getting really close to not a balloon... why not use a long balloon? You can get ones that are really narrow. Mine are 1 inch diameter.

terence.tan wrote:

davecutting wrote:

terence.tan wrote: I'm just wondering, what is your take on ballon. because I think that a plastic bag should work

That's getting really close to not a balloon... why not use a long balloon? You can get ones that are really narrow. Mine are 1 inch diameter.

Yeah i was thinking about that at first. but never got a chance to do it. Just wondering does the long balloons ever have trouble inflating the 20 cm?

davecutting wrote:

terence.tan wrote:

davecutting wrote:
That's getting really close to not a balloon... why not use a long balloon? You can get ones that are really narrow. Mine are 1 inch diameter.

Yeah i was thinking about that at first. but never got a chance to do it. Just wondering does the long balloons ever have trouble inflating the 20 cm?

No, the ones I have are 60cm long. I think. They are never fully inflated, which is good because a fully inflated balloon would be risky.

terence.tan wrote:

davecutting wrote:

terence.tan wrote: Yeah i was thinking about that at first. but never got a chance to do it. Just wondering does the long balloons ever have trouble inflating the 20 cm?

No, the ones I have are 60cm long. I think. They are never fully inflated, which is good because a fully inflated balloon would be risky.

also how do you get the baking soda into the bottle. is it already in the balloon?

terence.tan wrote:

PM2017 wrote:This is a post made in desperation after our original idea failed.

For the balloon task, we wanted to use the decomposition of H2O2, using MnO2 as a catalyst. It failed with the 3 percent H2O2 that we used. (Failed as in only the base of the balloon swoll, maybe 1 cm, and didn't increase from there) What's worse is that we were using this for our chemical timer as well.

Advice? We have a competition in two weeks, so we're stressing out right now, so any help is much appreciated.

EDIT: The only problem that we have is that this was meant to be our chemical timer, otherwise, we could just use the baking soda and vinegar.

if you were to use baking soda and vinegar but still have the chemical timer you can put the baking soda into little pill capsules that dissolve in water. this will delay the reaction
I hope this helps

PM2017 wrote:

terence.tan wrote:

PM2017 wrote:This is a post made in desperation after our original idea failed.

For the balloon task, we wanted to use the decomposition of H2O2, using MnO2 as a catalyst. It failed with the 3 percent H2O2 that we used. (Failed as in only the base of the balloon swoll, maybe 1 cm, and didn't increase from there) What's worse is that we were using this for our chemical timer as well.

Advice? We have a competition in two weeks, so we're stressing out right now, so any help is much appreciated.

EDIT: The only problem that we have is that this was meant to be our chemical timer, otherwise, we could just use the baking soda and vinegar.

if you were to use baking soda and vinegar but still have the chemical timer you can put the baking soda into little pill capsules that dissolve in water. this will delay the reaction
I hope this helps

Thanks for the response!
Would this still count as a chemical timer, though? (I'm fine with this being a physical timer for my first comp, but it would be nice to know)

terence.tan wrote:

PM2017 wrote:

terence.tan wrote: if you were to use baking soda and vinegar but still have the chemical timer you can put the baking soda into little pill capsules that dissolve in water. this will delay the reaction
I hope this helps

Thanks for the response!
Would this still count as a chemical timer, though? (I'm fine with this being a physical timer for my first comp, but it would be nice to know)

well the pill capsule needs to dissolve so yes it is a chemical timer

PM2017 wrote:

terence.tan wrote:

PM2017 wrote:
Thanks for the response!
Would this still count as a chemical timer, though? (I'm fine with this being a physical timer for my first comp, but it would be nice to know)

well the pill capsule needs to dissolve so yes it is a chemical timer

But dissolution does not change the chemical identity of the solute or the solvent.

terence.tan wrote:

PM2017 wrote:

terence.tan wrote: well the pill capsule needs to dissolve so yes it is a chemical timer

But dissolution does not change the chemical identity of the solute or the solvent.

oh wait your right. you could decrease the temp of the vinegar(I guess)

ScottMaurer19 wrote:

terence.tan wrote:

PM2017 wrote: But dissolution does not change the chemical identity of the solute or the solvent.

oh wait your right. you could decrease the temp of the vinegar(I guess)

But dissolution could arguably be chemical reaction. Goes from solid to aqueous or if it's an ionic compound then the dissolution involves the splitting of the compound. And then changing temp would change the rate of dissolution.