Jump to.. Imported ceramic bowls are ana leached from the ceramic by the food in
ID: 542725 • Letter: J
Question
Jump to.. Imported ceramic bowls are ana leached from the ceramic by the food in contact with it. The amount of cadmium that can be leached from the bowl is determined by adding an acetic acid solution to the cadmium concentration in the acidic leaching solution is determined. In one experiment, the cadmium concentration in an acidic leaching solution was analyzed using coupled plasma atomic emission from a 100 0.50 mL, and 0.60 ml of the stock solution to six separate 50.0 mL volumetric flasks. À known, constant amount of a yttrium stock solution was added as an internal standard, resulting in a final concentration of for toxic heavy metals such as cadmlum since these metals can inmetals such as cadmium since these metals can be Map cb bowl for a 24 hour period, after which the inductively spectroscopy (ICP-AES) A series of cadmium standards were prepared Cd stock solution. A micropipet was used to deliver 0.10 mL, 0.20 mL, 0.30 ml, 0.40 ml, ppm Y in each flask. The volumetric flasks were then diluted to the mark. 25.0 mL of the leaching solution was then pipetted into a separate 50.0 mt volumetric flask. The same known, constant amount of the yttrium stock solution was added to the flask containing the leaching solution, again resulting in a final concentration of 0.80 ppm Y. The flask was then diluted to the mark. The intensities of the cadmium and yttrium emissions are shown in the table below for each of the standard solutions and the unknown solution. Vol. Cd Soln. Added (mL) 0.10 0.20 0.30 0.40 0.50 0.60 Unknown Intensity of Cd Emission 11.22 16.75 39.96 70.66 83.82 152.7 71 23 Intensity of Y Emission 20.58 17.15 26.03 35.03 33.54 48.61 42.30 Calculate the cadmium concentration in the original leaching solution. Numbe ppm Previous Q Gve Up & Visw Saiution @ Check Answer NextxiExplanation / Answer
Leaching concentration of Cd will be 0.42 mL
Because initial concentration of Cd is 100 mL taken.
And the amount 0.40 mL of Cd solution titrated with other solution has almost similar prediction.
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