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14 February, 02:06

In the reaction below, 150.0 g of water is collected. how many liters of sulfuric acid were used if the concentration is 0.650 m? h2so4 + na2co3 → na2so4 + co2 + h2o 1. 17.0 l 2. 0.670 l 3. 4.23 l 4. 12.8 l 5. 4130 l 6. 10.6 l

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  1. 14 February, 03:42
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    Answer is: 12,8 l of H₂SO₄.

    Chemical reaction: H₂SO₄ + Na₂CO₃ → Na₂SO₄ + CO₂ + H₂O.

    m (H₂O) = 150 g.

    c (H₂SO₄) = 0,650 mol/dm³.

    V (H₂SO₄) = ?

    n (H₂O) = m (H₂O) : M (H₂O)

    n (H₂O) = 150 g : 18 g/mol = 8,33 mol.

    from reaction: n (H₂SO₄) : n (H₂O) = 1 : 1.

    n (H₂SO₄) = 8,33 mol.

    c = n : V, V = n : c.

    V (H₂SO₄) = 8,33 mol : 0,650 mol/dm³ = 12,81 dm³.
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