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Sagot :
Step 1
The reaction:
1 A (aq) + 1 B (s) <=> 2 C (aq) + 1 D (aq)
A, C and D participate in the equilibrium constant K
B doesn't participate
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Step 2
Data provided:
At equilibrium:
[A] =4.5 x 10^-4 M
[C] = 1.2 x 10^-2 M
[D] = Unknown
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Step 3
[tex]K\text{ = }\frac{\lbrack D\rbrack^1\lbrack C\rbrack^2}{\lbrack A\rbrack^1}=\frac{\lbrack D\rbrack.(1.2x10^{-2}M)^2}{(4.5x10^{-4}M)}=\text{ 2.0 x 10}^{-6}[/tex]Answer:
[D] = 6.25x10^-6 M
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