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Posted: Tue Aug 28, 2007 10:39 am
by jamesleerpc
my hypothesis has to be null....i dont know how to word it but my teacher said it had to start like this:"there is no significant difference....
Posted: Tue Aug 28, 2007 10:45 am
by jamesleerpc
But:
La raison de ce projet est à trouver quelle type d’analgésique comprimé donnes-tu le plus rapide soulagement. Les analgésiques sont aspirine, Ibuprofèn, Naproxen Sodium, et Acétaminophène. Je serais trouver ça par mesure combien se prend pour un comprimé à dissoudre. J’ai un mal à la tête presque chaque jour et je veux le plus rapide soulagement. Alors, après avoir faire ça, je saurai quelle type d’analgésique à utilise pour ai le plus rapide soulagement.
Hypothèse:
Je pense que Acétaminophène donnera le plus rapide soulagement base sur le fait ce dit sur le flacon « agit rapidement de façon temporaire pour soulager. » Plus, ce a non couché et je pense les comprimés sans une couche se dissoudre plus rapide.
Variables:
Indépendante : La type d’analgésique comprimé être testé.
Dépendante : Combien ce prend pour les différentes type de comprimés à dissoudre.
Contrôles :
La qualité d’acide hydrochlorique (ou chaque comprimé est dissoudre dans. (125 ml)·
La température de l’acide hydrochlorique chaque comprimé est dissoudre dans. (34º à 37º)·
La concentration de l’acide hydrochlorique.·
La force des comprimés. (régulier)·
L’endroit ou l’expérience est être tenir. ·
La quantité de chaque type de comprimé être testé.·
La vitesse de remue de la remuer de magnétique
Matériel :
Choses nécessaires pour faire l’expérience :
125 ml -Acide hydrochlorique ou vinaigre si tu ne peux pas obtenir l’acide. -Un laboratoire
5 comprimés-Ibuprofèn -ma maison
5 comprimés-Acétaminophène-ma maison
5 comprimés-Aspirine -Walmart
5 comprimés-Naproxen Sodium-Walmart
1-chronomètre digital -ma maison
1-bécher ver-l’école
1-paire de gant -ma maison
1-un tablier de laboratoire-l’école
1-paire de lunettes-l’école
1-thermomètre-la maison
1-rumeur de magnétique-Un laboratoire
175 ml-L’eau-la maison
Procédé :
1.Met les gants, le tablier, et des lunettes.
2.Organiser la rumeur de magnétique, le bécher, le chronomètre digital et le thermomètre.
3.Avec le thermomètre, fait sûre la température de l’acide de hydrochlorique est 37º (la température du corps), si ce n’est pas ça, chaleur ou frais l’acide à avoir la raison température.
4.Verse 1125 ml de l’acide hydrochlorique à 1125 ml de l’eau. PAS L’EAU À L’ACIDE- ACIDE À L’EAU! Maintenant tu as 2250 ml de solution.
5.Verse 125-ml de solution dans la bécher.
6.Met la bécher sur la rumeur de magnétique et met l’aimant de la rumeur de magnétique dans la bécher.
7.Goutte un analgésique dans une bécher et allume la rumeur de magnétique.
8.Immédiatement commence à propos combien de temps se prend pour l’analgésique se dissoudre complètement.
9.Quand les analgésiques comprimés se dissoudre complètement rapport le temps et se débarrasser de la solution correctement.
10.Lave la bécher et tous les matériaux, et sécher complètement.
11.Répète les étapes # 4-9 et n’oublie pas à fait chaque type 5 temps à fait sûre le répond est raison.
12.Fait la moyenne de chaque marque.
13.Vous avez finissez!
Résultat :
L’original but de cette expérience est d’à trouver quelle type d’analgésique comprimé donnes-tu le plus rapide soulagement. Je vais trouver ça par mesure combien se prend pour le comprimé a dissoudre. Je serai utilise la rumeur de magnétique, et l’acide de hydrochlorique (ou vinaigre.) Je ferai les graphiques et tableaux comme ça : (sur le prochain page)
_________________
Thanks,
hhamodat
Back to top
hhamodat
Occupation: student
Project Question: what type of pain reliever dissolves the fastes and is there a difference between generic and brand?
Project Due Date: Feb.19 2007 proposal
Project Status: I am finished with my experiment and analyzing the data Posted: Mon Dec 11, 2006 5:25 pm Post subject:
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ok je fait une erreur. pour #4 :Verse 125 ml de l’acide hydrochlorique à 175 ml de l’eau. PAS L’EAU À L’ACIDE- ACIDE À L’EAU! Maintenant tu as 300 ml de solution. et pour #5.Verse 15-ml de solution dans la bécher
desolee!
Merci,
Hayam
What is this?
Posted: Tue Aug 28, 2007 10:46 am
by jamesleerpc
i have to have my hypothesis and procedure sheet by tomorrow!i need an example of a nulll hypothesis please someone help me!
Posted: Tue Aug 28, 2007 10:47 am
by jamesleerpc
also what is a magnetic stirrer?
Posted: Tue Aug 28, 2007 11:13 am
by MelissaB
Jamesleerpc,
This is not a chat room and you should not expect an answer to your question right away. Experts only check the forum every 24-48 hours.
You will be much better served by putting your questions into a search engine or an online encyclopedia than asking here, because with the search engines you will get answers right away. For example, go to
http://www.wikipedia.org and look up 'null hypothesis' and 'magnetic stirrer'. There are excellent discussions of each at that site, and a google search on those terms probably would have directed you to wikipedia.
I think Terik's French is better than my own, so I'll let him translate the procedure for you.
Posted: Tue Aug 28, 2007 1:01 pm
by Louise
MelissaB wrote:Jamesleerpc,
This is not a chat room and you should not expect an answer to your question right away. Experts only check the forum every 24-48 hours.
You will be much better served by putting your questions into a search engine or an online encyclopedia than asking here, because with the search engines you will get answers right away. For example, go to
http://www.wikipedia.org and look up 'null hypothesis' and 'magnetic stirrer'. There are excellent discussions of each at that site, and a google search on those terms probably would have directed you to wikipedia.
I think Terik's French is better than my own, so I'll let him translate the procedure for you.
I'm pretty sure you can find Hhmadot's procedure in English by reading through the entire thread, which Terik ever so kindly provided links to. The french portion is merely the summary that was submitted to the teacher, however the project is discussed in detail in the threads.
I totally agree with Melissa about the search engine. I get the feeling that you want us to do everything for you. Even simple terms you ask us to define, rather than look them up yourself. I suggested that you to search for this project on the forums, and even gave you the user name of the person who did the project, but you appeared not to look at them until Terik provided the links. I've said this before- the more effort you put in the more help you'll get. We want to help you, and we want you to do well, but we want to know that you are working as hard (or harder, since it is your project) on this as we are.
Anyway, if your hypothesis is different, which is probably should be, your experiment should be designed different. Basically, the hypothesis of the other person was "I think acetominophen will dissolve the fastest, since the bottle says it 'acts quickly'. Also, it does not have a coating, and I think tablets without a coating will dissolve fastest"
Start thinking of different hypotheses. Here are a few examples:
1) smallest pills dissolve fastest
2) coated pills dissolve fastest
3) gel coated pills dissolve fastest
4) advil dissolves fastest
5) yellow pills disolve fastest.
you get the idea...
Then, decide which one is most interesting to you, and generate the null hypothesis.
Louise
Posted: Tue Aug 28, 2007 1:42 pm
by jamesleerpc
ok i am sorry if i am trying to make you do all the work...i am just stressed but my teacher said i needed a null hypothesis and i was wondering if you could read it and critique mine...."There is no significant difference in the rate at which different pills dissolve in a solution at pH 3."
Posted: Tue Aug 28, 2007 1:48 pm
by jamesleerpc
i was on google trying to find resources such as what tylenol, advil, etc is made up of but i cant find any...Do you have a suggestion?
Posted: Tue Aug 28, 2007 3:03 pm
by deleted-71588
http://www.advil.com/products/advil/tablet_label.asp
http://www.tylenol.com/product_detail.j ... ubpreg#Top
Hope the above links help. If you start at
http://www.advil.com and
http://www.tylenol.com you can get to different packaging and formulations for them.
While the FDA requires all of the inert ingredients to be listed for allergy purposes on the patient package insert, the manufacturer is not required to list the amounts.
As for finding Hydrochloric acid, check at a pool maintenance or hardware / masonry supply store for Muriatic Acid.
Posted: Tue Aug 28, 2007 3:27 pm
by jamesleerpc
THank you so much that was so helpful info!!!!!!
Posted: Tue Aug 28, 2007 4:18 pm
by jamesleerpc
how can i buy a magnetic stirrer?
Posted: Tue Aug 28, 2007 4:19 pm
by jamesleerpc
also is there a way to be hydrochloric acid without it being restricted?
Posted: Tue Aug 28, 2007 5:44 pm
by Louise
jamesleerpc wrote:ok i am sorry if i am trying to make you do all the work...i am just stressed but my teacher said i needed a null hypothesis and i was wondering if you could read it and critique mine...."There is no significant difference in the rate at which different pills dissolve in a solution at pH 3."
This is perfect. Ask your teacher if he or she can order the acid for you. Also, he or she may have the magnetic stir system. This system can be expensive to buy, but your lab may have.
Louise
Posted: Wed Aug 29, 2007 2:00 pm
by jamesleerpc
all right thx louise!...btw i got 50+ bonus points because my science fair topic is very interesting to him!i am so happy everythin i have done so far has pleased my teacher alot and ill ask him aobut the stirrer...
Thanks a lot,
James
Posted: Wed Aug 29, 2007 4:26 pm
by deleted-2131
If you would still like hhamodat's formal procedure translated from French, please let me know. I am glad things are going well for you.
Posted: Sat Sep 01, 2007 2:13 pm
by jamesleerpc
ok thanks i would like it translated please
Posted: Sun Sep 02, 2007 8:02 am
by Louise
jamesleerpc wrote:all right thx louise!...btw i got 50+ bonus points because my science fair topic is very interesting to him!i am so happy everythin i have done so far has pleased my teacher alot and ill ask him aobut the stirrer...
Thanks a lot,
James
Congrats on the good grade! (and the bonus). Just remember, you did most of this yourself, we just gave you some pointers!
Ask your teacher about doing the experiment in lab too. HCl can be nasty stuff!
Louise
Posted: Mon Sep 03, 2007 4:01 pm
by deleted-2131
jamesleerpc,
Here is a translation of the procedure.
The goal of this project is to find out which type of pain reliever dissolves most rapidly. The pain relievers are aspirin, ibuprofen, naproxen sodium, and acetamenophin. I will measure how much of each tablet dissolves...
Hypothesis: I think that the acetemenophin will dissolve quickest because it says on the bottle that it acts quickly to relieve pain...
Variables:
Independant: the type of pain reliever being tested
Dependant: Differences inhow long it takes to dissolve
Controls:
Amount of HCl, concentration of HCl, temperature of the acid, quantity of each pain reliever, speed of the magnetic stirrir...
Materials:
125 ml HCl or vinegar if I can't get the HCl - from lab
5 pills of ibuprofen - from home
5 pills acetemenophin - from home
5 pills aspirin - from Wal Mart
1 digital clock - from home
1 pair of gloves - from home
1 beaker - from school
1 lab apron- from school
1 pair lab goggles - from school
1 thermometer - from home
1 magnetic stirrir - from lab
175 mL water - from home
Procedure:
1. Put on the gloves, the apron, and the glasses
2. set up the magnetic stirrir, the beaker, the clock, and the thermometer
3. with the thermometer, make sure the temperature of the acid is 37 C, if it is not warm or cool the acid to reach this temperature **DO NOT ATTEMPT TO HEAT OR COOL ACID. LET YOUR TEACHER DO THIS IF IT NEEDS DONE**
4. Add 125 mL of acid to 175 mL of water. Add acid to water, not water to acid. Now you have 300 mL of soultion
5. Pour 15 mL of the solution into the beaker
6. Put the beaker on the magnetic sitrrir and put the stirrir into the beaker
7. Put the pain relieving tablet into the beaker
8. Immediately start timing the dissolving of the pill with the clock.
9. When the pill is completely dissolved, report the time and the state of the solution
10. Wash the beaker and all materials **SEE YOUR TEACHER FOR INSTRUCTIONS ON DOING THIS**
11. Repeat steps 4-9 with the other 4 pills of that type.
12. Repeat for each type of pain reliever
13.You are done!
I didn't translate all of hhamodat's hypothesis because you need to come up with your own. Same for the controls and introduction. If you have questions, let me know. Some things do tend to get "lost in translation..."
Posted: Mon Sep 03, 2007 4:40 pm
by Louise
Let me emphasize this part-
Add acid to water, not water to acid. Now you have 300 mL of soultion
It is very important that you follow this- ask your teacher for safety procedures for handling acid.
See also-
http://antoine.frostburg.edu/chem/senes ... acid.shtml
Louise
Posted: Wed Sep 05, 2007 6:50 pm
by jamesleerpc
Thank you for telling me to add acid to water because i was about to do it the other way around and also, how much HCl would i need if i need to dilute it to a pH of 3?
Posted: Wed Sep 05, 2007 7:17 pm
by MelissaB
Again, I want to reiterate Louise's safety information--you should be doing thi at school under the supervision of your teacher.
That said, we can't answer your question unless we know what concentration your HCL is.
Posted: Thu Sep 06, 2007 6:36 am
by Louise
jamesleerpc wrote:Thank you for telling me to add acid to water because i was about to do it the other way around and also, how much HCl would i need if i need to dilute it to a pH of 3?
You really need to read EVERYTHING we told you to. You can get SERIOUSLY HURT doing this project. I discussed the safety protocols in detail in the threads Terik linked to. Both Terik and I have told you to read them. I've mentioned the safety concerns a few times. You cannot be lazy about this, or you will get sick or burned. You should also be working with your teacher in a lab (I've said this too!). The fumes of the acid are strong. You also cannot just dump acid down the drain, your teacher needs to help you to dispose of it. You should be wearing long sleeve clothing, long pants (jeans are best), eye goggles, and chemically resistant gloves.
As for the pH thing, we went over that in the other thread too. As Melissa said, it depends on your starting concentration of acid. There is a formula (given in the other thread) you use to calculate the dilutions.
Louise
Posted: Thu Sep 06, 2007 1:56 pm
by jamesleerpc
Ok Thank You very much for all the information. I was wondering if I should work with a neighbor who is a chemist or my chemistry teacher do you have a suggestion?
Thanks,
James
Posted: Thu Sep 06, 2007 4:07 pm
by Louise
jamesleerpc wrote:Ok Thank You very much for all the information. I was wondering if I should work with a neighbor who is a chemist or my chemistry teacher do you have a suggestion?
Thanks,
James
You should work with someone trained in lab work (like your science teacher) and have access to running water. If you do get splashed with acid, how quickly you can get water on the area to wash it off is critical for preventing acid burns. {Generally, chemicals on the skin at treated by 10-15 minutes of running water- in addition to any needed medical treatment.} This is also why you wear gloves and goggles. You need to wear long sleeves (cotton is best), jeans, and closed toed shoes. [My undergrad lab we dropped acide on various types of clothing. Trust me! Cotton is the best thing to be wearing. Jeans are thick, so acid takes a while to eat through. Non-natural fibers (such as polyester) often melt in to a gooey mess and embed in your skin if exposed to acid)
Here is some more safety information for HCl:
http://www.jtbaker.com/msds/englishhtml/h3886.htm
It is a good idea to look over this with your teacher. It does sound very scary, but it basically lists every possible bad thing and how to fix it, so it is useful to have if something goes wrong.
I personally think you should be working in a hood as well, as the fumes can be strong. You certainly must have an adult present to supervise, and able to call for help if needed.
A lot of this info I pulled from the other thread. I expanded on it a bit to convince you how serious this is.
Louise
Posted: Thu Sep 06, 2007 6:52 pm
by deleted-2131
Like Louise, I cannot overstate the importance of safety in this project. HCl is a VERY DANGEROUS chemical. DO NOT do ANYTHING without working with a lab-trained chemist. Don't even open the bottle. Since this is a school project, you should be working with your teacher.
You MUST, I repeat, you MUST wear closed toed shoes, long sleeved shirt, long pants, chemical goggles, acid-resistant gloves, and a chemical apron. It is critical that you have rapid access to an eyewash station and shower, preferebly within less than 5 seconds on where you are working. If at all possible, DO THIS PROJECT IN A FUME HOOD! Your chemistry teacher will know what this is.
For your own health and safety, and the health and safety of those around you, you MUST FOLLOW SAFETY GUIDELINES!!!
Posted: Sat Sep 08, 2007 2:53 pm
by jamesleerpc
What if our teacher is a biology teacher?and also ... should i use 25mL of HCl for each tablet or more?because in some threads it said 50mL nad in some it sad 25mL
Posted: Sun Sep 09, 2007 9:47 am
by Louise
jamesleerpc wrote:What if our teacher is a biology teacher?and also ... should i use 25mL of HCl for each tablet or more?because in some threads it said 50mL nad in some it sad 25mL
You need to talk to your teacher about the safety issues. I don't know your teacher, what type of lab space it availble, or what type of safety gear is around.
As for the second part, you should develop your own experimental protocols. I have no idea what your procedure or hypothesis is. [I know what the null hypothesis is, but that is the null of about a million different experiments.] The other poster was comparing a few very similar types of pills, and did some test experiments to determine the volume that could work. In that case, there was a limitted supply of acid, so I believe the volumes were reduced over the course of the discussion. I also think you have chosen a different pH, which might have an impact on the volumes used.
Louise
Posted: Sun Sep 09, 2007 1:13 pm
by jamesleerpc
Alrighty then thanks for the info...and by the way i have some names for a title but do you have suggestions for any?
Thanks,
James
Posted: Mon Sep 10, 2007 2:52 pm
by deleted-2131
You title should be an accurate reflection of your project. It shoudl give anyone who reads your title a general idea of what your project is about. If you stick to these guidelines, you'll come up with a great title.
Posted: Tue Sep 11, 2007 4:33 pm
by jamesleerpc
thx terik...also ummm in the inactive ingredients inside the pills is their something i have to look for specifically?
thanks,
james