Solid \[Ba{{(N{{O}_{3}})}_{2}}\] is gradually dissolved in a \[1.0\times {{10}^{-4}}M\,N{{a}_{2}}C{{O}_{3}}\] solution. At which concentration of \[B{{a}^{2+}}\] precipitate of \[BaC{{O}_{3}}\] begins to form? (\[{{K}_{sp}}\] for \[BaC{{O}_{3}}=5.1\times {{10}^{-9}}\])

Solid \[Ba{{(N{{O}_{3}})}_{2}}\] is gradually dissolved in a \[1.0\t

1.	Solid \[Ba{{(N{{O}_{3}})}_{2}}\] is gradually dissolved in a \[1.0\times {{10}^{-4}}M\,N{{a}_{2}}C{{O}_{3}}\] solution. At which concentration of \[B{{a}^{2+}}\] precipitate of \[BaC{{O}_{3}}\] begins to form? (\[{{K}_{sp}}\] for \[BaC{{O}_{3}}=5.1\times {{10}^{-9}}\])
A.	\[5.1\times {{10}^{-5}}M\]
B.	\[7.1\times {{10}^{-8}}M\]
C.	\[4.1\times {{10}^{-5}}M\]
D.	\[8.1\times {{10}^{-7}}M\]
Answer» B. \[7.1\times {{10}^{-8}}M\]

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Solid \[Ba{{(N{{O}_{3}})}_{2}}\] is gradually dissolved in a \[1.0\times {{10}^{-4}}M\,N{{a}_{2}}C{{O}_{3}}\] solution. At which concentration of \[B{{a}^{2+}}\] precipitate of \[BaC{{O}_{3}}\] begins to form? (\[{{K}_{sp}}\] for \[BaC{{O}_{3}}=5.1\times {{10}^{-9}}\])

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