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Computing milligrams of nned

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Reference no: EM132410215

1.) A 0.5-L unbuffered solution needs the pH adjusted from 6.8 to 3. How many microliters of a 6 molar HCl solution need to be added to adjust the pH?

2.) After reacting the nitrate with cadmium to produce nitrite, the nitrite is then reacting with sulfanilamide and N-(1-naphthyl)-ethylenediamine, to produce a purple dye molecule that can be quantified on a spectrophotometer.

The N-(1-naphthyl)-ethylenediamine, called NNED for convenience, reagent is made by mixing 1 gram of NNED in 1 liter of water. However, we don't always want to make an entire liter of solution because the NNED solution only lasts about 1 month before going bad and turning brown.

How many milligrams of NNED will need to be added to make 150 milliliters of solution?

Reference no: EM132410215

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