Chem Lab C

[dracomander]

As far as I know, periodicity has never been a topic before, so I don't think there are any official ones. if anyone knows of one though, I would love to hear about it too.

[Skink]

Does anyone have any good tests or know where to find a good test that has both periodicity and electrochemistry? I've checked the SciOly test exchange, and none of the tests there are both periodicity and electrochem. Thanks in advance

The thing about this is you can find so many introductory college level lecture notes, past exams, etc. online now that you don't necessarily need an SO test to practice this. You won't find the two topics together, but I'd bet you could find plenty separately with a few Google searches.

[haverstall]

Does anyone have any good tests or know where to find a good test that has both periodicity and electrochemistry? I've checked the SciOly test exchange, and none of the tests there are both periodicity and electrochem. Thanks in advance

The thing about this is you can find so many introductory college level lecture notes, past exams, etc. online now that you don't necessarily need an SO test to practice this. You won't find the two topics together, but I'd bet you could find plenty separately with a few Google searches.

Not to mention, if you have a dedicated Chem teacher (who doesn't necessarily need to be involved in SciOly), just ask them for questions regarding these topics. They will probably have a boatload of questions ready to dump on you.

[anmlee]

This is my first time doing Chem Lab, and I have a general idea from my friend who did it before, but I have a few questions regarding the event:

1. My friend said that when she did the event last year, the event was basically about doing an experiment (?). Apparently, the supervisors gave each group a packet, which told them to do certain procedures (i.e. titration), and she and her partner had to do it without any specific instructions on how to do it. In other words, they had to know and understand how to do experiments. I was wondering if this was true for the Southern California competitions?

2. Also, for periodicity...when they mean physical properties, what do they specifically mean? If anyone could give me a list of topics regarding it--for example, periodicity trends, thermochemistry, etc.

THANK YOU VERY MUCH:D

[XXGeneration]

an example of a periodic table trend is:

electronegativity: increases right to left across the periodic table, and increases top to bottom. therefore, fluorine has one of the largest electronegativities, and francium is one of the smallest. this is more likely than not (correct me if I'm wrong) due to having more protons (atomic number increases) compared to the same number of shielding electrons (look this up if you don't get it; it's basically like electrons that don't participate in the bonding shell).


more can be found by googling "trends on the periodic table"

Edit: as for the south californian competitions, can't help you with that as I am from NJ.

[Phenylethylamine]

1. My friend said that when she did the event last year, the event was basically about doing an experiment (?). Apparently, the supervisors gave each group a packet, which told them to do certain procedures (i.e. titration), and she and her partner had to do it without any specific instructions on how to do it. In other words, they had to know and understand how to do experiments. I was wondering if this was true for the Southern California competitions?

I wouldn't know anything about Southern California competitions, but this is very much what the New York State competition is like (or at least, was like last year). Being familiar with common lab procedures and tasks would be very useful.

[chem_kid20]

Do you think the regional tests will cover more of REDOX reactions, periodic trends, or electrochemistry? I'm struggling to learn this electrochemistry for the competition in a week!

[Skink]

Understanding redox is the basis for electrochemistry, so I don't know how you could do one without the other. I would start at the beginning with the reactions and work into the electrochem business afterwards.

[bandgeek165]

For the Chem Lab event, hypothetically, could an AP Chem student get by just with what they already know about chemistry? From reading over the rules sheet it sounds like most of it is basic chem skills and my partner has basically explained the event as such. I'm a junior and this is my first year ever doing Science Olympiad and I'm just trying to figure everything out. Opinions? Advice? Thanks!

[EASTstroudsburg13]

Generally, a student who has completed AP Chem should be able to get by with that knowledge. However, it is very helpful to review everything, because some of the stuff, especially redox, can be easy to forget.

[Phenylethylamine]

For the Chem Lab event, hypothetically, could an AP Chem student get by just with what they already know about chemistry? From reading over the rules sheet it sounds like most of it is basic chem skills and my partner has basically explained the event as such. I'm a junior and this is my first year ever doing Science Olympiad and I'm just trying to figure everything out. Opinions? Advice? Thanks!

Depending on the competition and the event writer, this event can require anywhere from zero practical lab knowledge to far, far more than you'd get from a typical AP Chem course (more on par with an undergrad honors chem course). As far as the test questions, standard AP Chem knowledge is just fine, but for some of the labs, you'll need a better knowledge of various lab equipment, common reactions, and general lab procedure than most AP Chem students have.

[Mathc314]

This is my first year doing Chem Lab. However, my older brother has done it the past two years at states and nationals, so I do have some idea of what it will be like.
So my question is:
When it says tasks will be taken from the following, does that mean that those are the only possible electrochem labs we could be given, or should i practice other common labs in addition to those on the sheet?
Thanks in advance!

[Phenylethylamine]

This is my first year doing Chem Lab. However, my older brother has done it the past two years at states and nationals, so I do have some idea of what it will be like.
So my question is:
When it says tasks will be taken from the following, does that mean that those are the only possible electrochem labs we could be given, or should i practice other common labs in addition to those on the sheet?
Thanks in advance!

While I've only ever seen labs that came off the list, I've only competed in Chem Lab a few times, so I'm not exactly an authority there. However, from what I have seen, even when they give you a lab off the list, it's not always presented the way you expect it to be, and may require you to use lab skills that you didn't necessarily expect.

For example, at NY States last year, we had a Beer's Law lab (looking at absorbance to determine concentration, using a spectrophotometer), which we expected. However, what we didn't expect was that they made us make up all our own solutions for the curve... but only gave us one beaker, one graduated cylinder, and one cuvette, so we had to make each concentration of the solution by doing a dilution on the previous one. The hard part of that event was not the spectrophotometry, or even making the curve and determining the concentration of the unknown; it was doing the dilutions (of course, it didn't help that we somehow ended up with a defective pipette bulb, and we didn't know enough about how to use the bulb to be certain that it wasn't just us doing something wrong, so it took forever to measure out the volume of water each time).

[pihi]

Is it possible to be doing this event and taking Chem AP at the same time? Or would it be better to just wait one more year?

[Phenylethylamine]

Is it possible to be doing this event and taking Chem AP at the same time? Or would it be better to just wait one more year?

I did this event before taking AP Chem and while taking AP Chem, and the only thing I recommend is that if you haven't yet done a significant amount of lab work in your AP Chem class, ask your teacher to work with you outside of class on lab skills (based on the list in the rules, but also just general things like proper measuring procedures, how to use common equipment, etc). If you're 2/3 of the way through the class and you've been consistently doing labs in class, you'll probably be fine.

If you haven't gotten to the specific topics for this year's event in class yet, that should not be a problem as long as you can get the notes for those topics (or whatever materials your teacher uses) from your teacher in advance. The event isn't totally based on AP Chem, it just happens to have some significant overlap.