Lab Help!!!!!!!!!!!!?
831401
Put it in hot water.\n\nTo slow the process put it in ice cold water.
980022
Mm...I remember when I did this lab last year. I will try to help you \n\n1. I don't remember. If you add more details...I'll be able to help you\n2. We need an equilibration period, so we start the experiment in all the vials at the same condition. SO..all of them are at the same temperature, pressure and we won't get far away from the expected results.\n\n3. the volume? Well...I am not sure about this one. You should explain a little bit more. But..I remember that KOH that you  you put in the cotton will absorbe CO2 produced by the vials that have the respiration process going on.\n\n4. again..provide background information about the experiment\n\nPLEASE...we know that it is about cellular respiration. But it the questions don't make sense to us if we don't know a little more about the procedure!
762625
you could do something like, the effects of pollutants on soil, then to show your experiment try growing plants in different types of soil, have one with normal soil, your control, then others with different pollutants, oil, chemicals, garbage\nHopefully this could help
967067
that's so weird, we're doing something similar in my bio class...\n\nI would agree with you....glucose should be broken down faster...perhaps theres some error in ur results.\n\nI did the same experiment...and I had glucose produce a little more CO2 than sucrose.
526078
mostly acids. do your own homework
1029887
This might help\nhttp://www.labxnews.com/labxnews185.htm\n\nor\n\nChiller Assembly &\n® Operating Instructions\nModel 75 Viscometer\nCHILLER ASSEMBLY\nThe two modes of operation for the Model 75 Viscometer are: (1) standard heat with tap water cool-down mode and (2)\nchilled sample mode.\nFor most efficient operation in the chilled sample mode, enter the desired temperature using the front panel keypad, the\nsample temperature will be indicated on the LCD readout.\nChiller operation:\nRefer to Fig. B.\nDisconnect the Drain Line from the “Drain” connection on the manifold, and replace with the chiller Liquid In line.\nConnect the Liquid Out line to the “Chiller” connection on the manifold. The “Water Inlet” connection on the remote test\nstation can remain connected as the internal solenoid valve will stop tap water from entering the unit.\nSet the chiller operating temperature 4?C to 8?C colder than the desired sample temperature (this will speed-up the cooling\nprocess). When the sample temperature is within this 4?C to 8?C range, change the chiller temperature setting to with-in\n2?C below the desired sample temperature.\nNOTE: The coldest temperature that can be set on the chiller is minus 12?C.\nThe chiller assembly can cool a 200 Centipoise silicone calibration fluid from room temperature to -7?C in less than 30\nminutes (with sample stirred at 40 RPM). When the sample is maintained at a temperature below freezing for any length of\ntime, an ice shell builds around the cell holder. This ice can be heated off or allowed to slowly melt off, but in either case a\nconsiderable amount of water will accumulate on the base plate.\nA mixture of 50% ethylene glycol (P/N F4173) and 50% distilled water (P/N 52717) can be used as the chiller coolant. This\nmixture should be replaced after three months of service.\nDuring operation of the chiller, the pressure gauge at the outlet should read in the 15 - 25 PSI range. A pressure reading\nbelow 15 PSI indicates: (A) a possible leak in the system, or (B) the bypass valve has been opened too much. A reading\nabove 30 PSI indicates: (A) the possibility of an obstruction, or (B) the bypass valve is closed too much.\nThe use of the cell insulator cap (P/N C6121) is required for sample temperature equilibrium, and prevents an ice shell from\nforming on the top cap. The cell insulator cap must be removed for heated operation as its upper limit is 120?C before\nmelting.\nStandard heated sample/tap water cool down operation:\nRefer to Fig. A\nConnect the Water Drain line to the “Drain” connection on the manifold. The Tap Water In line should be connected to\nthe “Water Inlet” on the manifold. The liquid out line from the chiller can be left connected to the “Chiller Inlet” on the\nremote test station during the heating operation, as the check valve will prevent contamination of chiller coolant.\nPart No. E10890001EA Rev. -\nCHILLER SPECIFICATIONS:\nPower Required………………8 amps at 115VAC, 60hz\nReservoir………………………0.5 gallon (2 liters)\nPumping rate………………….1.6 gallon per minute at 45-60 psig\nWeight………………………….80 pounds\nDimensions……………………13” X 21” X 19”
153776
get a good book\nlike the McGraw and Hill\nthats what we have in our Lab Chemistry class\nor go to the bonny eagle high school page and get the email for Helen Steele\nshe is a geneous i bet she could help you
394349
This article might help if you reproduce their test system:\nhttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=15159161&dopt=Abstract
777731
Try this...this may help you http://www.stevespanglerscience.com/
831122
Use the smallest mechanical pipette for the purpose, i.e., if you need to pipette 150 microliters, then use a 200 microliter pipette with tips to match. (I think these are correct scales; it has been awhile since I used the mechanical pipettes). I find a greater accuracy than trying to use a 1 ml pipette to aliquot 50 microliters of solution. I used a multiple mechanical pipette for ELISA plates; however, they often have one or more channel that does not fill properly on the first try. Therefore, I suggest, taking up, releasing and retaking the solution in the pipette until you visually verify the liquid levels in all tips are approximately equal. \n\nOn the whole, I have found that the retaking up of solution (take up aliquot, release, then refill the tip 1-3 times) makes for the most accurate takeup of the proper measured amount on the mechanical pipette.
380887
lol, last minute lab write ups. afaik enzymes dont change colour, as they are not supposed to change so id bet there is something else that the enzyme works on. better put up the other reagents to get a better answer
227627
Try a garden nursery. They will have soil testing kits that have test tubes in them.
1001873
Yes, you need a lab to do this! If that wasn't clear to you, this may not be the best project to try to copy!\n\nWhy not have an idea of you own, something you can do with what you have at hand at home? You might learn something!
844268
how were you measuring the pH? if it was a pH meter maybe it wasn't calibrated correctly/ recently?? or if it was with litmus paper.... maybe it went bad? I'm not sure if it can... check and see if there could have been an expiration date. i don't think temperature would have that drastic of an effect unless you did the experiment at pH7 and a seriously high (like about 60C) temp and the other ones at room temp or 37C (body temp)... sorry i cant help anymore then that, that's very strange!
564731
You can do your own? Thats pretty cool. I always liked the bubble gum mass lab. Take like two whole packages of bubbleyum and record its mass unwrapped (not the weight, your teacher should have a mass scale). Then chew all of it for about forty minutes. Don't swallow. Record the mass of the chewed blob. It'll be less even though its still the same gum. The chewing excretes certain substances out of it (some research required there). This'll actually work for a physical science or a chemistry lab. And while your classmates are working hard on their labs you'll be blowing bubbles the whole time. Hope that helps.
607818
http://www.webmd.com/hw/lab_tests/hw1768.asp
43703
How about the red fountain experiment with acids and litmus solutions? mail me at pr4kane@yahoo.com for furhter details on it. u can try electroplating,bleaching by chlorine/so2,the brown ring test with sulphuric acid etc.