2 years ago

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Chemistry

1 answer:

timama [110]2 years ago

7 0

Answer:4

Explanation:number 4 is the right answer :)

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Look at sample problem 19.10 in the 8th ed Silberberg book. Write the Ksp expression. Find the concentrations of the ions you ne

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From the information given:

$CaF_2 \to Ca^{2+} + 2F^-$

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no of moles of $F^-$ = $1 \times 10^{-6}\ mol$

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$[F^{-}] = 5 \times 10^{-5} \ mol/L$

$Q = [Ca^{2+}][F^-]^2 \\ \\ Q = 0.0005 \times (5\times 10^{-5})^2 \\ \\ Q = 1.25 \times 10^{-12}$

Since Q<ksp, then there will no be any precipitation of CaF2

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