\( \mathrm{Sr}^{2+} \) forms a very unstable complex with \( \mathr...

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\( \mathrm{Sr}^{2+} \) forms a very unstable complex with \( \mathrm{NO}_{3}^{-} \).
A solution that was \( 0.001 \mathrm{M}-\mathrm{Sr}\left(\mathrm{ClO}_{4}\right)_{2} \) and
P
W its strontium in the uncomplexed \( \mathrm{Sr}^{2+} \) form, the balance being \( \operatorname{Sr}\left(\mathrm{NO}_{3}\right)^{+} \). What is the value of \( K_{\mathrm{f}} \) for complexation?
(a) 6.67
(b) 0.15
(c) 60
(d) 26.67
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