Calculate the ratio of \( \left[\mathrm{HCOO}^{-}\right] \)and \( \left[\mathrm{F}^{-}\right] \)...

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Calculate the ratio of \( \left[\mathrm{HCOO}^{-}\right] \)and \( \left[\mathrm{F}^{-}\right] \)in a mixture of \( 0.2 \mathrm{MHCOOH}\left(K_{a}=2 \times 10^{-4}\right) \) and \( 0.1 \mathrm{MHF}\left(K_{a}=6.6 \times 10^{-4}\right) \) :
(a) \( 1: 6.6 \)
(b) \( 1: 3.3 \)
(c) \( 2: 3.3 \)
(d) \( 3.3: 2 \)
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