9. At 15 C, an aqueous solution of succinic acid containing 12.1 g/l of acid is in equilibrium with an ethereal solution containing 2.2 g/l of succinic acid. Determine the concentration of the ethereal solution (g/l), which is in equilibrium with an aqueous solution containing 9.68 g/l of succinic acid. Succinic acid has normal molecular weight in water and ether.

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