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The concentration of pb²⁺ in a sample of wastewater is to be determined by using gravimetric analysis. to a 100.0-ml sample of the wastewater is added an excess of sodium carbonate, forming the insoluble lead (ii) carbonate (267 g/mol) according to the balanced equation given below. the solid lead (ii) carbonate is dried, and its mass is measured to be 0.1443 g. what was the concentration of pb²⁺ in the original wastewater sample? pb²⁺(aq) + na₂co₃(aq) -> pbco₃(s) + 2na⁺(aq)
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