A 25.0 mL sample of waste water is obtained to analyze for Pb2 ions. This sample is evaporated to dryness and redissolved in 2.0 mL of H2O, mixed with 2.0 mL of a buffer solution and 2.0 mL of a solution of dithizone then diluted to 10.0 mL. The absorbance of the colored Pb2 - dithizone complex is compared with the Beer-Lambert plot below. 8. The absorbance of a portion of the final solution is 0.13. What is the concentration of Pb2 ions in the waste water in ppm
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Ответ:
That would be the right answer.