Suppose an EPA chemist tests a 250. mL sample of groundwater known to be contami

Question

Suppose an EPA chemist tests a 250. mL sample of groundwater known to be contaminated with tin (II) chloride, which would react with silver nitrate solution like this: SnCl2 (aq) + 2AgNO3(aq) rightarrow 2AgCl(s) + Sn(N03)2 (aq) The chemist adds 44.0 mM silver nitrate solution to the sample until silver chloride stops forming. He then washes, dries, and weighs the precipitate. He finds he has collected 3.5 mg of silver chloride. Calculate the concentration of tin (II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits.

Explanation / Answer

answer is tan(35)

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