Дано:m р-ра (CH3COOH) = 600 гω (CH3COOH) = 10%
Найти:m (соли) - ?
1) CH3COOH + NaOH => CH3COONa + H2O;2) m (CH3COOH) = ω (CH3COOH) * m р-ра (CH3COOH) / 100% = 10% * 600 / 100% = 60 г;3) M (CH3COOH) = Mr (CH3COOH) = Ar (C) * N (C) + Ar (H) * N (H) + Ar (O) * N (O) = 12 * 2 + 1 * 4 + 16 * 2 = 60 г/моль;4) n (CH3COOH) = m (CH3COOH) / M (CH3COOH) = 60 / 60 = 1 моль;5) n (CH3COONa) = n (CH3COOH) = 1 моль;6) M (CH3COONa) = Mr (CH3COONa) = Ar (C) * N (C) + Ar (H) * N (H) + Ar (O) * N (O) + Ar (Na) * N (Na) = 12 * 2 + 1 * 3 + 16 * 2 + 23 * 1 = 82 г/моль;7) m (CH3COONa) = n (CH3COONa) * M (CH3COONa) = 1 * 82 = 82 г.
Ответ: Масса CH3COONa составляет 82 г.
Автор:
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