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4 years ago

5

A water supply has been contaminated with

2 answers:

Readme [11.4K]4 years ago

8 0

<span>Metals which are from precipitate with sulfate and carbonate are barium and Lead.

The only toxic of these metals is lead. Lead is heavy metal which is denser with most common materials.
It contains major decay chain which has heavier elements. It is unreactive post-transition metal.</span>

pickupchik [31]4 years ago

6 0

According to the provided table of solubility the metals that form a precipitate with carbonate and sulfate are Ba and Pb but the only toxic one of these two metals will be Pb (lead)

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3 years ago

A method used by the U.S. Environmental Protection Agency (EPA) for determining the concentration of ozone in air is to pass the

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$O_3(g)+2NaI(aq)+H_2O(l) \rightarrow O_2(g)+I_2(s)+2NaOH(aq)$

According to stoichiometry:

1 mole of ozone is removed by 2 moles of sodium iodide.

Thus $4.54 \times 10^{-6}$ moles of ozone is removed by = $\frac{2}{1}\times 4.54 \times 10^{-6}=9.08\times 10^{-6}$ moles of sodium iodide.

Thus $9.08\times 10^{-6}$ moles of sodium iodide are needed to remove $4.54\times 10^{-6}$ moles of $O_3$

2. $\text{Number of moles of ozone}=\frac{0.01331g}{48g/mol}=0.0003moles$

According to stoichiometry:

1 mole of ozone is removed by 2 moles of sodium iodide.

Thus 0.0003 moles of ozone is removed by = $\frac{2}{1}\times 0.0003=0.0006$ moles of sodium iodide.

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Thus 90 mg of sodium iodide are needed to remove 13.31 mg of $O_3$ .

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3 years ago