can any angel tell me how can I making a compound called buffer? i need it to use it at my work dyehome
203488
Chemicals used in the reaction is important. What is the pKa of the reactant? Research on which buffer and what its pH buffering region is important, because it should cover the pKa region of the chemicals used. Once knowing which buffer to make, we can take a buffer by making a mixture that have a weak acid with its salt of conjugate base, or weak base with its conjugate acid. It should be noted that here buffer solutions are presented in terms of the Brønsted-Lowry notion of acids and bases.
372367
USE DIFFERENT STAINING FOR BACTERIA EX. GRAM STAINING. LOOK UP DIFFERENT BACTERIA STAINING
399980
what affects buffers?\n\ndepends on which bufffers  -pH will with solubility, aas will temperature\n\nmaximum capacity depends on individual buffer - citric acid maxes at 3 base molecules, as does phosphates..\n\n\nnow to the question - what will you do for me?????   Good  thing I am a Christian - so i'll just take a thank you
352797
K2CrO4 +Pb(NO3)2 ---> PbCrO4(s)  + 2KNO3\n\nNice yellow ppt.
523507
I am not sure if you want to find a more sophisticated method of MIXING it or if you are looking for the forumla to MAKE concrete but if you wanted to make your own concrete it consists of equal volume amounts of cement, sand, and gravel. Cement itself is made up of limestone, gypsum, and clay. And if you wanted a more sophisticated method of mixing it, get a 5 gallon plastic paint bucket with a lid. Pour the dry concrete and water into the bucket and then close up tightly and start rolling the bucket.\nRoll it for about 20 minutes and you will have nicely mixed concrete.
371352
In general, dyes can be considered normal chemicals. Try looking into processing some chemicals that you are familiar with, for example ethanol, bleach, vinegar (acetic acid), etc.
443531
No, plain water is not adequate.  It has no buffering potential.  A buffer is a acid or base dissolved with a sufficient quantity of its salt to accept significant additions of acid or base while resisting drastic pH change.\n\nThere are lots of tables you can find in most inorganic chemistry textbooks, technician's handbooks, the Handbook of Chemistry and Physics, the Merck Index, etc that tell you what solutions to make and how to mix them to achieve a buffer with good activity at any given pH.  I don't have a library in my room and I can't really find a good websource so you'll have to do the legwork.  Prepare the solutions and combine them as stated.\n\nThen, based on the components, you will have to determine if the molarity (of what?) matches the ionic strength you have.  I have provided a link to a webpage that describes the ionic strength calculation.\n\nGood luck.
76772
I think I would use drywall compound (spackle). just work it into the grooves and lightly sand it off after it dries. it is NOT water soluble, so you could rinse it with hot water to get it back out when you're done.\n\nI meant to say it IS water soluble
519311
google search chemistry tutorials . there are thousands of sites\nchemtutor.com\nhighschoolace.com\nchemistrycoach.com\nechemistryhelp.com\nare just some of the few that i use.\nthey're really helpful!
281187
Add agarose, and buffer to flask.  For a 1% gel, at one gram of agarose for each 100 mL of buffer.  Microwave in a flask that is at least twice the size of the volume you are boiling, and once it's cool, add EtBr.  (Or, you can add the EtBr to the running buffer).  Pour into your gel set-up, pull out the combs when it sets, and voila.
610223
Use the "fill".  So highlight the cell then use the brush to fill in the color that you want.  It should work!
531456
Here is a great site, made specially for teachers, that has many tutorials, plus links to others\n\nGood luck\nhttp://sciencepage.org/chem.htm
676073
You will need to hit the library since such general information will require multiple books to explain.  If you have some specific questions, post those.  Just the dyeing part is a very complicated subject if you want details.  If you want some general starting points look at the links at \n\nhttp://www.itt.edu/staff/boyter/links/index.html#WASTEWATER
598313
try this\n\nhttp://en.wikipedia.org/wiki/Category:Laboratory_equipment
245640
here is a sample list\nNAME OF THE PRODUCT C.I. HUE NAME C. I. NO. \nMETHYL VIOLET PDR OR CRYSTAL BASIC VIOLET 1 42535 \nBASIC MAGENTA POWDER BASIC VIOLET 2 42520 \nRHODAMINE B 540% BASIC VIOLET 10 45170 \nRHODAMINE B 500% BASIC VIOLET 10 45170 \nBASIC VIOLET B BASIC VIOLET 26 --------- \nAURAMINE O H/CONC BASIC YELLOW 2 41000 \nCRYSODINE BASIC ORANGE 2 11270 \nBASIC BROWN R BASIC BROWN 4 21010 \nDIAMOND GREEN CRYSTAL/POWDER BASIC GREEN 1 42040 \nMELACHITE GREEN CRYSTAL BASIC GREEN 4 42000 \nMETHYL BLUE PDR 200% BASIC BLUE 9 52015 \nMETHYLENE BLUE ZINC FREE \n(PHARMACEAUTICAL GRADE) BASIC BLUE 9 52015 \nVICTORIA BLUE B BASIC BLUE 26 44045 \nSULFAR BLACK GRAINS -------  53185 \n\n\nlet me remind you that positively charged dyes are also known as basic dyes. You could search the web more easily with that piece of information i guess.
235998
Since you need simple and portable, how about starting with something that uses light and prisms to create the spectrum? \nFrom there, you could go to show how rainbows are created ( where the light must be, what the sequence of the rainbow spectrum is) or compare how light colors mix compared to how m=paint colors mix.  I don't know if that is appropriate for the 10 th grade.  But working with light and prisms is always fun.\nmagnetism is always fun, too.
126252
add 2 parts HCl 1 part H20 to dilute properly