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# Finding the Concentration of an Ion in Solution

CHEM-1HTHKW

What is the concentration of ${Na}^{+}(aq)$ if $1.54\text{ g}$ of ${Na}_{2}S(s)$ is added to $200\text{ mL}$ of water?

A

$0.197\text{ M }$

B

$8.10\times {10}^{-2}\text{ M }$

C

$9.87\times {10}^{-2}\text{ M }$

D

$0.154\text{ M }$