Question

Укажите вещества, необходимые для осуществления превращения H++OH-=H2O1)соляная кислота и гидроксид бария2)серная кислота и гидроксид меди(II)3)фосфорная кислота и оксид кальция4) кремниевая кислота и гидроксид натрия

Answer 1

1)соляная кислота и гидроксид бария
2HCl+Ba(OH)2= BaCl2+H2O
2H(+)+2Cl(-)+Ba(2+)+2OH(-)= Ba(2+)+2Cl(-)+H2O
H(+)+OH(-)=H2O

Answer 2

Required Substances for the Transformation of H⁺ + OH⁻ → H₂O

1. Sulfuric Acid and Barium Hydroxide - Sulfuric acid (H₂SO₄) and barium hydroxide (Ba(OH)₂) are required for the transformation of H⁺ + OH⁻ → H₂O. - Sulfuric acid is a strong acid, and barium hydroxide is a strong base. When they react, they form water and a salt. - The balanced chemical equation for the reaction is: H₂SO₄ + 2Ba(OH)₂ → BaSO₄ + 2H₂O [[1]].

2. Sulfuric Acid and Copper(II) Hydroxide - Sulfuric acid (H₂SO₄) and copper(II) hydroxide (Cu(OH)₂) are needed for the transformation of H⁺ + OH⁻ → H₂O. - Sulfuric acid is a strong acid, and copper(II) hydroxide is a base. When they react, they form water and a salt. - The balanced chemical equation for the reaction is: H₂SO₄ + Cu(OH)₂ → CuSO₄ + 2H₂O [[2]].

3. Phosphoric Acid and Calcium Oxide - Phosphoric acid (H₃PO₄) and calcium oxide (CaO) are necessary for the transformation of H⁺ + OH⁻ → H₂O. - Phosphoric acid is a weak acid, and calcium oxide is a strong base. When they react, they form water and a salt. - The balanced chemical equation for the reaction is: 2H₃PO₄ + 3CaO → Ca₃(PO₄)₂ + 3H₂O [[3]].

4. Silicic Acid and Sodium Hydroxide - Silicic acid (H₄SiO₄) and sodium hydroxide (NaOH) are required for the transformation of H⁺ + OH⁻ → H₂O. - Silicic acid is a weak acid, and sodium hydroxide is a strong base. When they react, they form water and a salt. - The balanced chemical equation for the reaction is: H₄SiO₄ + 4NaOH → Na₄SiO₄ + 4H₂O [[4]].

These substances are used to neutralize the acidic or basic nature of the solutions and produce water as a result of the reaction.