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  • The solubility product for a salt of the type AB is . What is the molarity of its st

The solubility product for a salt of the type AB is 4 \times 10^{-8}. What is the molarity of its standard solution?

Option: 1

\mathrm{16\times 10^{-16}\; mol/L}


Option: 2

\mathrm{2\times 10^{-16}\; mol/L}


Option: 3

\mathrm{4\times 10^{-4}\; mol/L}


Option: 4

\mathrm{2\times 10^{-4}\; mol/L}


Answers (1)

best_answer

\begin{matrix} \mathrm{AB\rightleftharpoons} & \mathrm{A^{x+}} & + & \mathrm{B^{x-}} &\mathrm{,K_{sp}=4\times10^{-8}} \\ & \textup{s} & & \textup{s} & \end{matrix}
We have,

\\\mathrm{S^{2}=4\times10^{-8}}\\ \mathrm{S=2\times10^{-4}M}

Hence the correct answer is option 4

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Pankaj

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