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Enter your answer in the provided box. The concentration of lead ions (Pb2+) in a sample...

Enter your answer in the provided box.

The concentration of lead ions (Pb2+) in a sample of polluted water that also contains nitrate ions (NO3−) is determined by adding solid sodium sulfate (Na2SO4) to exactly 500 mL of the water. Calculate the molar concentration of Pb2+ if 0.00295 g of Na2SO4 was needed for the complete precipitation of lead ions as PbSO4.

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Please pardon me if there is slight error, it is due to big calculation

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