Can't Judge a Powder B

MareezyWA
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Re: Can't Judge a Powder B

Postby MareezyWA » February 14th, 2015, 2:30 pm

Thank you to all who responded. But there were questions about temperature and nearly all the other teams had thermometers. In looking at our state website, there were no rules clarifications posted. We are really thinking that we needed to ask the event supervisor for one... and that is why they looked so flat when all we said was "no" when they asked us if we had one. We should have said, "No, the rules said that event supervisor may provide." Perhaps they thought if we knew the rules, we would ask for it... but this was our first time and we are not sure what to ask the judge just yet. Our coach is going to try to get clarification before state. Thanks again. It makes me very sad that things have to be so confusing to prevent cheating.

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Re: Can't Judge a Powder B

Postby boomvroomshroom » February 21st, 2015, 11:06 am

MareezyWA wrote:Thank you to all who responded. But there were questions about temperature and nearly all the other teams had thermometers. In looking at our state website, there were no rules clarifications posted. We are really thinking that we needed to ask the event supervisor for one... and that is why they looked so flat when all we said was "no" when they asked us if we had one. We should have said, "No, the rules said that event supervisor may provide." Perhaps they thought if we knew the rules, we would ask for it... but this was our first time and we are not sure what to ask the judge just yet. Our coach is going to try to get clarification before state. Thanks again. It makes me very sad that things have to be so confusing to prevent cheating.


Just bring a printout of the rules to all of your events - especially the lab events. When I did CJAP, the "STUDENT MATERIALS" and "SUPERVISOR MATERIALS" were one of the first things listed, and it was written out in a very simple to read list. Don't be afraid to call out the event supervisors for not following instructions - a lot of these people are unpaid volunteers and won't get anything out of this (unlike the competitors, who have a chance of earning medals and bragging rights) so they may or may not care as much.

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Re: Can't Judge a Powder B

Postby samlan16 » February 21st, 2015, 12:03 pm

boomvroomshroom wrote:
MareezyWA wrote:Thank you to all who responded. But there were questions about temperature and nearly all the other teams had thermometers. In looking at our state website, there were no rules clarifications posted. We are really thinking that we needed to ask the event supervisor for one... and that is why they looked so flat when all we said was "no" when they asked us if we had one. We should have said, "No, the rules said that event supervisor may provide." Perhaps they thought if we knew the rules, we would ask for it... but this was our first time and we are not sure what to ask the judge just yet. Our coach is going to try to get clarification before state. Thanks again. It makes me very sad that things have to be so confusing to prevent cheating.


Just bring a printout of the rules to all of your events - especially the lab events. When I did CJAP, the "STUDENT MATERIALS" and "SUPERVISOR MATERIALS" were one of the first things listed, and it was written out in a very simple to read list. Don't be afraid to call out the event supervisors for not following instructions - a lot of these people are unpaid volunteers and won't get anything out of this (unlike the competitors, who have a chance of earning medals and bragging rights) so they may or may not care as much.

Make sure your coach brings his or her rules as well in case someone on the team wants to challenge an event for a rules violation.
Remember, we are proud of every team that participated and you are all winners.

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Re: Can't Judge a Powder B

Postby Maddie14 » February 25th, 2015, 12:52 pm

How do you find endothermic and exothermic without using a thermometer?

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Re: Can't Judge a Powder B

Postby Maddie14 » February 25th, 2015, 1:00 pm

Does anybody know how you find endothermic and exothermic?

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Re: Can't Judge a Powder B

Postby samlan16 » February 25th, 2015, 2:31 pm

Maddie14 wrote:Does anybody know how you find endothermic and exothermic?

An endothermic rxn absorbs heat, whereas an exothermic releases heat. To determine which type a reaction is, touch the side of the beaker/ spot plate and note any fluctuations in temperature. For more info, this website explains each type from a qualitative standpoint: http://www.kentchemistry.com/links/Matter/EndoExo.htm.
Remember, we are proud of every team that participated and you are all winners.

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Re: Can't Judge a Powder B

Postby boomvroomshroom » February 25th, 2015, 4:18 pm

Maddie14 wrote:Does anybody know how you find endothermic and exothermic?

Exothermic: releases heat, so if you touch the side of the beaker it should get hotter. If you have a thermometer, temperature will go up. (Be careful - if you stir too much you can also add heat to your reaction through kinetic energy, and you might see the temperature go up slightly even without any exothermic reaction.)

Similarly, endothermic reactions absorb heat, so the beaker will feel colder and temperature goes down.

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Re: Can't Judge a Powder B

Postby Jaol » February 26th, 2015, 5:19 pm

I know this isn't on topic but if I asked on General they wouldn't know/answer. Soooo does anyone know where 2015-2016 national tourney is? Please reply.

Thanks
Countdown: 66 Days

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Re: Can't Judge a Powder B

Postby bernard » February 26th, 2015, 7:15 pm

Jaol wrote:I know this isn't on topic but if I asked on General they wouldn't know/answer. Soooo does anyone know where 2015-2016 national tourney is? Please reply.

Thanks

The 2016 National Tournament will be at the University of Wisconsin, Stout. See a full list of future locations here.
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Re: Can't Judge a Powder B

Postby Jaol » February 26th, 2015, 8:53 pm

Thanks bernard.
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Re: Can't Judge a Powder B

Postby MariaK » February 28th, 2015, 11:51 am

Is it important to test the materials they already gave us like the water, HCI,and NAOH, to test for any differences?

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Re: Can't Judge a Powder B

Postby samlan16 » February 28th, 2015, 3:16 pm

MariaK wrote:Is it important to test the materials they already gave us like the water, HCI,and NAOH, to test for any differences?

Yes, it helps to establish a control in order to compare your results after rxns; particularly, things like pH, conductivity, or temperature.
Remember, we are proud of every team that participated and you are all winners.

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Re: Can't Judge a Powder B

Postby MareezyWA » March 1st, 2015, 2:48 pm

I am sorry but I simply cannot find the way to post a new topic so hope you won't mind me asking this here. The rules say that test tubes are allowed (for students to bring) as well as spot plates, well plates, reaction plates, beakers or similar small containers for mixing.

I wanted to make sure that plastic (disposable) test tubes with caps are allowed. They make swirling very easy and not messy. These would appear to be legal because they are test tubes and they are also small containers for mixing.

Have students used these in the past and was there a problem?

Thanks for your help.

Mareezy

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Re: Can't Judge a Powder B

Postby MareezyWA » March 1st, 2015, 3:04 pm

samlan16 wrote:
boomvroomshroom wrote:
MareezyWA wrote:Thank you to all who responded. But there were questions about temperature and nearly all the other teams had thermometers. In looking at our state website, there were no rules clarifications posted. We are really thinking that we needed to ask the event supervisor for one... and that is why they looked so flat when all we said was "no" when they asked us if we had one. We should have said, "No, the rules said that event supervisor may provide." Perhaps they thought if we knew the rules, we would ask for it... but this was our first time and we are not sure what to ask the judge just yet. Our coach is going to try to get clarification before state. Thanks again. It makes me very sad that things have to be so confusing to prevent cheating.


Just bring a printout of the rules to all of your events - especially the lab events. When I did CJAP, the "STUDENT MATERIALS" and "SUPERVISOR MATERIALS" were one of the first things listed, and it was written out in a very simple to read list. Don't be afraid to call out the event supervisors for not following instructions - a lot of these people are unpaid volunteers and won't get anything out of this (unlike the competitors, who have a chance of earning medals and bragging rights) so they may or may not care as much.

Make sure your coach brings his or her rules as well in case someone on the team wants to challenge an event for a rules violation.


We had our coach check recently by contacting the regional coordinator. She asked the even supervisor and they apparently were told to provide thermometers. Teams were NOT supposed to bring them. So when they got to us and we told them that we did not bring one (pretty much all other teams had them), they threw out the questions that had to do with temperature. I guess they would have had to DQ a lot of teams for bringing something that was not on the list so the judges thought this was easier. Fine with that. Also, for Crime Busters, at our regional the rules said that distilled water would be provided but they made us take water out of the tap. Wow, with some of these pH's on powders hanging at about 8, distilled water would seem to be pretty important because tap water can vary from pH of 6.8-8.2. Gosh, you are right, you gotta watch everything... sure hope that it is just a lack of experience and not an attempt to give certain teams an advantage because we know that cheating does go on... but I would hope that judges would not enable that.

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Re: Can't Judge a Powder B

Postby Skink » March 1st, 2015, 5:21 pm

MareezyWA wrote:I am sorry but I simply cannot find the way to post a new topic so hope you won't mind me asking this here. The rules say that test tubes are allowed (for students to bring) as well as spot plates, well plates, reaction plates, beakers or similar small containers for mixing.

I wanted to make sure that plastic (disposable) test tubes with caps are allowed. They make swirling very easy and not messy. These would appear to be legal because they are test tubes and they are also small containers for mixing.

Have students used these in the past and was there a problem?

Thanks for your help.

Mareezy

These topics are for all-inclusive individual event discussion, so you're correct in posting here!
Anyway, some schools don't, even, have glass over plastic test tubes. You don't see them often, but they are out there. They're absolutely small containers for mixing, at any rate. Now, should they be substituted for glass if available? I'm supposing not. My primary concern is excessive heat from hot plates or matches. They're probably made to not readily melt within acceptable temperature ranges, but I'm not sure about that. You can get stoppers for glass test tubes, too! They're probably not necessary for any mixing seen in this event, though.


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