how to analyse Cyanide in wast water?
90129
Usually by adding copper, transferring the sample into a special reactor which makes it possible to capture resultant gas, and adding acid in order to move the cyanide from a large volume of sample to a small volume of analyte. Depending on your lab, you can determine the cleansed analyte by gravimetry, photometry or titration.\n\nNeedless to say that the process of driving out the cyanide needs to be placed in a suction board and supervized...
633022
NaCN-Sodium Cyanide-alkaline\nNH4NO3-Ammonium nitrate-acidic\nNH4Cl-Ammonium chloride-basic
601291
yes, you'll get hydrogen cyanide. you could perform the experiment in a gas chamber, but its quite dangerous
307824
dissolve the sample in KOH. Add AgNO3 and weigh the ppt. to obtain the halide content.
983289
carbon dioixde and chlorophil, water
840473
Need more specifics as to your problem.\n\nHowever, I assume you are trying to do a quantitation on a UV or vis absorbing substance.\n\nMake up  a set of standards of known concentration of your analyte in the solvent you will be analyzing in.  Then do some scans over the whole wavelength range. \n\nUsually pick the wavelength at the top of the largest absorbance peak, unless that is a wavelength which will have interferences from other substances present.  If so, then pick a wavelength with good absorbance that is not subject to such interference.
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.
1000766
The low technology approach is to use a densitometer.  This can be as simple as a hydrometer as used in the brewing industry to check for specific gravity (density).  From a measured density and a known volume and if you know the densities of both liquid components of a binary mixture you can work out the relative proportions of each using simultaneous equations and hence the concentration of one in the other.
215127
See links and sublinks at http://www.itt.edu/staff/boyter/links/index.html#CHEMISTRY_ANALYTICAL
900972
You could use a turbidometric method that could detect the diffraction of light through the liquid and correlate it with the amount of microbial growth in it.  \n\nYou could also use a calibrated loop to plate the liquid and then count colonies.  I know they do this with urine cultures in hospital labs at times.  The loop picks up a certain amount of liquid like 10 microliters or so and then you can correlate the growth with this 10 microliter figure.
756485
The water isn't involved in the reaction, so take it out.  Then, just put a 2 in front of the Nh2(SO3)H and a 2 in front of HNO3, and you're finished.\n\nNow, go take a nap or go to sleep...
553390
No, CN- is the cyanide ion.
239993
Links at\n\nhttp://www.itt.edu/staff/boyter/links/index.html#CHEMISTRY_CHROMATOGRAPHY
884562
Doesn't matter how much you started with.  The final amount remaining in the water at 20 will be 0.22g/100mL of solvent.\n\nSo your system will deposit 1.53g of SA at 20C.
1143443
Able to be dissolved by water.
261828
http://www.academic.marist.edu/~jfjp/chem351E3.htm\n\nThe alternate would be ion chromatography
860724
The link below gives a method and chromatogram.  Bear in mind that you will need to prevent the degradation of ascorbic acid during the analysis.  This may be done by adding EDTA and HCl to the solutions, but you will have to work out the concentrations.