why we substuite assay by titrations caliculation molicularweight/1000?
961122
You have to be more specific. As one knows, in titration, we determine the Normality or Molarity of solution which is titrated. Normality or Molarity of any solution depends on molecular weight. Mol Wt/1000 results in 1 N solution.... I think this is what you asked.
1110554
I believe you mean "titration".\n\nTitration is a way to measure the concentration of a dissolved substance by seeing exactly how much of a neutralizing substance you have to add to the mixture to bring it to a neutral concentration.  \n\nThis is usually done by adding drops of a neutralizing substance of known strength until the original solution becomes neutral.  By calculating exactly how much neutralizer was needed, you know the strength of the original mixture.
262851
CA27 ?? or the results where, 27.29? Knowing the test code and what it checks for would be helpful but On the results from the lab, there should be a reference range for this test next to the results or on the back if you have the org. \nSome labs, like LabCor or SmithKline have on-line testing information such as ranges and verables but most inportant, what did your doctor say? Your doc should be the one to inturp. the test results for you. They can factor in your age, histroy, why they did the test ect. Also give you peace of mind as to the results.
752263
titration is a very useful method for: pharmaceutical analysis, food analysis, oil analysis, pollution and environmental analysis. so users can be Chemists and Chemist engineers.
132324
For a titration, the equivalence point is the point when exactly all of the base has reacted with the acid.  This is not necessarily the point where moles of acid equals the moles of base.  If a diprotic acid and a group one base were titrated, for example, there would need to be twice the number of moles of base than of acid.  \nAnyways, the equivalence point is when acid and base have perfectly neutralized each other, so all there is is salt and water.  That means that at the equivalence point, the only thing that affects the pH of the solution is the pH of the salt.
1157075
Here is a very detailed write up :\n\nhttp://www.nicholsdiag.com/products/thyroid/di-calcit.pdf
586730
a.4\nb.6.2\n\nPlease belive me because I used a calulater.
697747
Hydroxy Naphthol Blue as a metallochromic indicator can be used  in the chelometric titration.
958234
maybe there is something wrong with test to had conducted that yields a wrong result.\n\ni'm not saying that your test is not correct.\n\nIt's just that it is not impossible that we commit errors in testing.\n\nremember the type I and II error in hypothesis testing.\n\n\nmaube the calculated and tabular value of your test has almost the same value.\nso it may suddenly falls under or above it.\n\n\nthat's why\ni think\nhoping it helps you
777772
I think you may have copied the chemical formula wrong;  more than likely you meant Ca(NO3)2 which is calcium nitrate.  On the chance that you did not copy the formula wrong it may be called calcium sodamate, the only problem is that the charges do not balance in this molecule nor do they come close to balancing (an imbalance of -8 charge)
679263
I think that what is troubling you could be an exerecise involving "molarity" which uses two quantities: mass(moles)/volume(liter). \nBut you have to bear in mind that mass is referred to the solute, and volume refers to the solution. So, these quantities are not referring to ONE substance. \nIt would be better if you posted a question with the whole exercise, for clarity. \nGood luck.
737939
Yes. It produces a bright yellow precipate:\nAgNO3 (aq) + KI (aq) → KNO3 (aq) + AgI (ppt)
298095
If the freezing point of the solution had been incorrectly read .3̊ lower than the true freezing point, then the observed ΔTf would have been greater than it should have been. This would have caused the calculated molality to be too high. If the calculated molality were too high, then the number of moles present as calculated would be too high. An\nexaggerated number of moles would cause the calculated molar mass to be too low, as the same weight of the substance would be distributed against more moles of that substance.\nThe substance would seem lighter than it is.\n\nI'm sure this will help,\nUltimeaciax
66136
I am looking for similar test answers but for the BONENT TEST which is for dialysis technicians.  If you receive any info..do you mind posting it?  Thanks in advance.\nRobert
560605
With IR you can dilute your soln so you have a bit more of it and then stick it on a plate and check out the peaks. That can give you a good idea of what you have... or there is HNMR, and CNMR, but it really depends on how much you have of the substance. If you have a general idea of what it might be then check the PH and give it a good guess... or use an indicator that might form some kind of ppt. with the substance in the soln . I've found that a refractive index really isnt the way to go because it isnt as reliable as other tests. Gas chromotograpy and Thin layer chormotograpy both require a general idea of what you might be coming up with... GC can be sketchy and you dont want to loose any sample on a test that might not tell you much, same with TLC, you would haev to be careful with the slovent interaction with the "unknown" that you have.
826531
tiny amounts of chemical can stick to differnt things, like stir bar, stir rod, thermometer and if you remove these items before the experiment is over then you remove some chemicals.  Other kinetics events that your not considering. as in pressure, humididtym and so on.  If you used a Ph probe then maybe it wasn't calibrated right or isn't properly maintained
87280
MBrO3-9H2O where M can be Na,K,Li, other +1 cations\n\nIf M is other than these you have to adjust subscripts