Ответы на вопрос:
Fe(oh)2 + h2so4 = feso4 + h2o fe(oh)₂ + 2h⁺+so₄²⁻ = fe²⁺+so₄²⁻+h₂o fe(oh)₂+2h⁺ = fe²⁺ + h₂o fe(oh)2 + 2hсl = fecl2 + 2h2ofe(oh)2 + 2h⁺ + 2cl⁻= fe²⁺ + 2cl⁻ + 2h₂o fe(oh)₂ + 2h⁺ = fe²⁺ + 2h₂o ba(oh)2 + cucl2 = cu(oh)2↓ + bacl2 ba²⁺+2oh⁻+cu²⁺+2cl⁻ = cu(oh)₂↓ + ba²⁺+2cl⁻ cu²⁺ + 2oh⁻ = cu(oh)₂↓ ba(oh)2 + 2hcl = bacl2 + 2h2o ba²⁺+2oh⁻ + 2h⁺+2cl⁻ = ba²⁺+2cl⁻ + 2h₂o 2h⁺+2oh⁻ = 2h₂o h⁺+oh⁻ = h₂o ba(oh)2 + na2so4 = baso4↓ + 2naoh ba²⁺+2oh⁻ + 2na⁺+so₄²⁻ = baso₄↓ + 2na⁺ + 2oh⁻ ba²⁺+so₄²⁻ = baso₄↓
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