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Chapter 15: Q36 E (page 873)

Calculate the concentration of F- required to begin precipitation ofCaF2 in a solution that is 0.010M in Ca2+.

Short Answer

Expert verified

The concentration of [F-] = 6.24脳10-5M

Step by step solution

01

Define concentration

The concentration is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical descriptions can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration.

02

Calculating the concentration of solution

Precipitation of F-will begin when the ion product value is higher thansolubility product constant value ofCaF2

\begin{aligned}{{K_{sp}}=3.9\times{{10}^{-11}}=\left[{{\rm{C}}{{\rm{a}}^{2+}}}\right]{{\left[{{{\rm{F}}^-}}\right]}^2}=0.010{{\left[{{{\rm{F}}^-}}\right]}^2}}\\{\left[{{F^-}}\right]=\sqrt{\frac{{3.9\times{{10}^{-11}}}}{{0.010}}}=6.24\times{{10}^{-5}}{\rm{M}}}\end{aligned}

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Most popular questions from this chapter

Write the ionic equation for dissolution and the solubility product \(({K_{sp }})\) expression for each of the following slightly soluble ionic compounds:

\(\begin{array}{l}\;(a)PbC{l_2}\\\;(b)A{g_2}S\\\;(c)S{r_3}{\left( {P{O_4}} \right)_2}\\\;(d)SrS{O_4}\end{array}\)

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Question: Write the Lewis structures of the reactants and product of each of the following equations, and identify the Lewis acid and the Lewis base in each:

\((a) C{S_2} + S{H^ - } \to HCS_3^ - \)

\({\rm{\;}}(b)\;B{F_3} + {F^ - } \to BF_4^ - \)

\(\;(c)\;{I^ - } + Sn{I_2} \to SnI_3^ - \)

\({\rm{\;}}(d)\;Al{(OH)_3} + O{H^ - } \to Al(OH)_4^ - \)

\(\;(e)\;{F^ - } + S{O_3} \to SFO_3^ - \)

Calculate the volume of 1.50MCH3CO2H required to dissolve a precipitate composed of 350mg each of and CaCO3,SrCO3,BaCO3

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